diff --git a/packages/SettingsLib/ActionBarShadow/Android.bp b/packages/SettingsLib/ActionBarShadow/Android.bp
index 800ab671cedba..4a07d49fcde51 100644
--- a/packages/SettingsLib/ActionBarShadow/Android.bp
+++ b/packages/SettingsLib/ActionBarShadow/Android.bp
@@ -19,5 +19,5 @@ android_library {
     ],
 
     sdk_version: "system_current",
-    min_sdk_version: "21",
+    min_sdk_version: "28",
 }
diff --git a/packages/SettingsLib/ActionBarShadow/lint-baseline.xml b/packages/SettingsLib/ActionBarShadow/lint-baseline.xml
deleted file mode 100644
index 4d5de5f46894f..0000000000000
--- a/packages/SettingsLib/ActionBarShadow/lint-baseline.xml
+++ /dev/null
@@ -1,37 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<issues format="5" by="lint 4.1.0" client="cli" variant="all" version="4.1.0">
-
-    <issue
-        id="NewApi"
-        message="Call requires API level 23 (current min is 21): `android.view.View#setOnScrollChangeListener`"
-        errorLine1="            mScrollView.setOnScrollChangeListener(mScrollChangeWatcher);"
-        errorLine2="                        ~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/ActionBarShadow/src/com/android/settingslib/widget/ActionBarShadowController.java"
-            line="81"
-            column="25"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="Call requires API level 23 (current min is 21): `android.view.View#setOnScrollChangeListener`"
-        errorLine1="        mScrollView.setOnScrollChangeListener(null);"
-        errorLine2="                    ~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/ActionBarShadow/src/com/android/settingslib/widget/ActionBarShadowController.java"
-            line="88"
-            column="21"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="Class requires API level 23 (current min is 21): `android.view.View.OnScrollChangeListener`"
-        errorLine1="    final class ScrollChangeWatcher implements View.OnScrollChangeListener {"
-        errorLine2="                                               ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/ActionBarShadow/src/com/android/settingslib/widget/ActionBarShadowController.java"
-            line="95"
-            column="48"/>
-    </issue>
-
-</issues>
diff --git a/packages/SettingsLib/ActionButtonsPreference/lint-baseline.xml b/packages/SettingsLib/ActionButtonsPreference/lint-baseline.xml
deleted file mode 100644
index 95b7e3b8033d7..0000000000000
--- a/packages/SettingsLib/ActionButtonsPreference/lint-baseline.xml
+++ /dev/null
@@ -1,81 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<issues format="5" by="lint 4.1.0" client="cli" variant="all" version="4.1.0">
-
-    <issue
-        id="NewApi"
-        message="`android:Widget.DeviceDefault.Button.Borderless.Colored` requires API level 28 (current min is 21)"
-        errorLine1="    &lt;style name=&quot;SettingsActionButton&quot; parent=&quot;android:Widget.DeviceDefault.Button.Borderless.Colored&quot;>"
-        errorLine2="                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/values/styles.xml"
-            line="19"
-            column="40"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="`android:drawableTint` requires API level 23 (current min is 21)"
-        errorLine1="        &lt;item name=&quot;android:drawableTint&quot;>@*android:color/btn_colored_borderless_text_material&lt;/item>"
-        errorLine2="              ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/values/styles.xml"
-            line="21"
-            column="15"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="`?android:attr/dialogCornerRadius` requires API level 28 (current min is 21)"
-        errorLine1="        android:topLeftRadius=&quot;?android:attr/dialogCornerRadius&quot;"
-        errorLine2="              ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_left_bk.xml"
-            line="23"
-            column="9"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="`?android:attr/dialogCornerRadius` requires API level 28 (current min is 21)"
-        errorLine1="        android:bottomLeftRadius=&quot;?android:attr/dialogCornerRadius&quot;"
-        errorLine2="              ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_left_bk.xml"
-            line="25"
-            column="9"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="`?android:attr/dialogCornerRadius` requires API level 28 (current min is 21)"
-        errorLine1="        android:topRightRadius=&quot;?android:attr/dialogCornerRadius&quot;"
-        errorLine2="              ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_right_bk.xml"
-            line="24"
-            column="9"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="`?android:attr/dialogCornerRadius` requires API level 28 (current min is 21)"
-        errorLine1="        android:bottomRightRadius=&quot;?android:attr/dialogCornerRadius&quot;"
-        errorLine2="              ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_right_bk.xml"
-            line="26"
-            column="9"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="`?android:attr/dialogCornerRadius` requires API level 28 (current min is 21)"
-        errorLine1="        android:bottomRightRadius=&quot;?android:attr/dialogCornerRadius&quot;"
-        errorLine2="              ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_bk.xml"
-            line="23"
-            column="9"/>
-    </issue>
-
-</issues>
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_left_bk.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_left_bk.xml
index 16a85d694bf81..8a25726ecd174 100644
--- a/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_left_bk.xml
+++ b/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_left_bk.xml
@@ -17,6 +17,8 @@
 
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
+       xmlns:tools="http://schemas.android.com/tools"
+       tools:targetApi="28"
        android:shape="rectangle">
     <solid android:color="?androidprv:attr/colorSurface" />
     <corners
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_right_bk.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_right_bk.xml
index 1b9f68fac8505..7e626e50255a7 100644
--- a/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_right_bk.xml
+++ b/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_right_bk.xml
@@ -1,22 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  ~ Copyright (C) 2021 The Android Open Source Project
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~      http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
+    Copyright (C) 2021 The Android Open Source Project
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
   -->
 
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
+       xmlns:tools="http://schemas.android.com/tools"
+       tools:targetApi="28"
        android:shape="rectangle">
     <solid android:color="?androidprv:attr/colorSurface" />
     <corners
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_bk.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_bk.xml
index a884ef11e8354..9f4980beb76f7 100644
--- a/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_bk.xml
+++ b/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_bk.xml
@@ -1,22 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  ~ Copyright (C) 2021 The Android Open Source Project
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~      http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
+    Copyright (C) 2021 The Android Open Source Project
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
   -->
 
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
+       xmlns:tools="http://schemas.android.com/tools"
+       tools:targetApi="28"
        android:shape="rectangle">
     <solid android:color="?androidprv:attr/colorSurface" />
     <corners
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/values/styles.xml b/packages/SettingsLib/ActionButtonsPreference/res/values/styles.xml
index 42c7d76a80e9a..8a449cfbb7c85 100644
--- a/packages/SettingsLib/ActionButtonsPreference/res/values/styles.xml
+++ b/packages/SettingsLib/ActionButtonsPreference/res/values/styles.xml
@@ -15,7 +15,9 @@
   limitations under the License.
   -->
 
-<resources>
+<resources
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:targetApi="28">
     <style name="SettingsLibActionButton" parent="android:Widget.DeviceDefault.Button.Borderless.Colored">
         <item name="android:drawablePadding">4dp</item>
         <item name="android:drawableTint">@*android:color/btn_colored_borderless_text_material</item>
diff --git a/packages/SettingsLib/BarChartPreference/Android.bp b/packages/SettingsLib/BarChartPreference/Android.bp
index ae2606661697e..4f6537334770e 100644
--- a/packages/SettingsLib/BarChartPreference/Android.bp
+++ b/packages/SettingsLib/BarChartPreference/Android.bp
@@ -14,7 +14,7 @@ android_library {
     resource_dirs: ["res"],
 
     static_libs: [
-          "androidx.preference_preference",
+        "androidx.preference_preference",
     ],
 
     sdk_version: "system_current",
diff --git a/packages/SettingsLib/BarChartPreference/lint-baseline.xml b/packages/SettingsLib/BarChartPreference/lint-baseline.xml
deleted file mode 100644
index f1043bb62fe1e..0000000000000
--- a/packages/SettingsLib/BarChartPreference/lint-baseline.xml
+++ /dev/null
@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<issues format="5" by="lint 4.1.0" client="cli" variant="all" version="4.1.0">
-
-    <issue
-        id="NewApi"
-        message="`@android:style/Widget.DeviceDefault.Button.Borderless.Colored` requires API level 28 (current min is 21)"
-        errorLine1="           parent=&quot;@android:style/Widget.DeviceDefault.Button.Borderless.Colored&quot;>"
-        errorLine2="           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/BarChartPreference/res/values/styles.xml"
-            line="35"
-            column="12"/>
-    </issue>
-
-</issues>
diff --git a/packages/SettingsLib/BarChartPreference/res/values/styles.xml b/packages/SettingsLib/BarChartPreference/res/values/styles.xml
index d1f562b38760c..1c44207171885 100644
--- a/packages/SettingsLib/BarChartPreference/res/values/styles.xml
+++ b/packages/SettingsLib/BarChartPreference/res/values/styles.xml
@@ -15,7 +15,9 @@
   limitations under the License.
   -->
 
-<resources>
+<resources
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:targetApi="28">
 
     <style name="SettingsBarChart">
         <item name="android:layout_marginStart">10dp</item>
diff --git a/packages/SettingsLib/HelpUtils/lint-baseline.xml b/packages/SettingsLib/HelpUtils/lint-baseline.xml
deleted file mode 100644
index 940f027295a76..0000000000000
--- a/packages/SettingsLib/HelpUtils/lint-baseline.xml
+++ /dev/null
@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<issues format="5" by="lint 4.1.0" client="cli" variant="all" version="4.1.0">
-
-    <issue
-        id="NewApi"
-        message="Call requires API level 28 (current min is 21): `android.content.pm.PackageInfo#getLongVersionCode`"
-        errorLine1="                sCachedVersionCode = Long.toString(info.getLongVersionCode());"
-        errorLine2="                                                        ~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/HelpUtils/src/com/android/settingslib/HelpUtils.java"
-            line="239"
-            column="57"/>
-    </issue>
-
-</issues>
diff --git a/packages/SettingsLib/HelpUtils/src/com/android/settingslib/HelpUtils.java b/packages/SettingsLib/HelpUtils/src/com/android/settingslib/HelpUtils.java
index 541a2468db455..70c8658a7f55b 100644
--- a/packages/SettingsLib/HelpUtils/src/com/android/settingslib/HelpUtils.java
+++ b/packages/SettingsLib/HelpUtils/src/com/android/settingslib/HelpUtils.java
@@ -25,6 +25,7 @@ import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.res.Resources;
 import android.net.Uri;
+import android.os.Build;
 import android.provider.Settings.Global;
 import android.text.TextUtils;
 import android.util.Log;
@@ -32,6 +33,7 @@ import android.view.Menu;
 import android.view.MenuItem;
 import android.view.MenuItem.OnMenuItemClickListener;
 
+import androidx.annotation.RequiresApi;
 import androidx.annotation.VisibleForTesting;
 
 import com.android.settingslib.widget.R;
@@ -73,6 +75,15 @@ public class HelpUtils {
     private HelpUtils() {
     }
 
+    /**
+     * Prepares the help menu item by doing the following.
+     * - If the helpUrlString is empty or null, the help menu item is made invisible.
+     * - Otherwise, this makes the help menu item visible and sets the intent for the help menu
+     * item to view the URL.
+     *
+     * @return returns whether the help menu item has been made visible.
+     */
+    @RequiresApi(Build.VERSION_CODES.P)
     public static boolean prepareHelpMenuItem(Activity activity, Menu menu, String helpUri,
             String backupContext) {
         // menu contains help item, skip it
@@ -84,6 +95,15 @@ public class HelpUtils {
         return prepareHelpMenuItem(activity, helpItem, helpUri, backupContext);
     }
 
+    /**
+     * Prepares the help menu item by doing the following.
+     * - If the helpUrlString is empty or null, the help menu item is made invisible.
+     * - Otherwise, this makes the help menu item visible and sets the intent for the help menu
+     * item to view the URL.
+     *
+     * @return returns whether the help menu item has been made visible.
+     */
+    @RequiresApi(Build.VERSION_CODES.P)
     public static boolean prepareHelpMenuItem(Activity activity, Menu menu, int helpUriResource,
             String backupContext) {
         // menu contains help item, skip it
@@ -105,6 +125,7 @@ public class HelpUtils {
      * @return returns whether the help menu item has been made visible.
      */
     @VisibleForTesting
+    @RequiresApi(Build.VERSION_CODES.P)
     static boolean prepareHelpMenuItem(final Activity activity, MenuItem helpMenuItem,
             String helpUriString, String backupContext) {
         if (Global.getInt(activity.getContentResolver(), Global.DEVICE_PROVISIONED, 0) == 0) {
@@ -152,6 +173,10 @@ public class HelpUtils {
         }
     }
 
+    /**
+     * Get the help intent from helpUriString.
+     */
+    @RequiresApi(Build.VERSION_CODES.P)
     public static Intent getHelpIntent(Context context, String helpUriString,
             String backupContext) {
         if (Global.getInt(context.getContentResolver(), Global.DEVICE_PROVISIONED, 0) == 0) {
@@ -223,7 +248,8 @@ public class HelpUtils {
      *
      * @return the uri with added query parameters
      */
-    private static Uri uriWithAddedParameters(Context context, Uri baseUri) {
+    @RequiresApi(Build.VERSION_CODES.P)
+    public static Uri uriWithAddedParameters(Context context, Uri baseUri) {
         Uri.Builder builder = baseUri.buildUpon();
 
         // Add in the preferred language
diff --git a/packages/SettingsLib/ProgressBar/lint-baseline.xml b/packages/SettingsLib/ProgressBar/lint-baseline.xml
deleted file mode 100644
index 03d0f3f43986a..0000000000000
--- a/packages/SettingsLib/ProgressBar/lint-baseline.xml
+++ /dev/null
@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<issues format="5" by="lint 4.1.0" client="cli" variant="all" version="4.1.0">
-
-    <issue
-        id="NewApi"
-        message="`?android:attr/colorSecondary` requires API level 25 (current min is 21)"
-        errorLine1="        android:background=&quot;?android:attr/colorSecondary&quot; />"
-        errorLine2="        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/ProgressBar/res/layout/progress_header.xml"
-            line="27"
-            column="9"/>
-    </issue>
-
-</issues>
diff --git a/packages/SettingsLib/ProgressBar/res/layout/progress_header.xml b/packages/SettingsLib/ProgressBar/res/layout/progress_header.xml
index 268858bebf0c0..52ff42cbfaad5 100644
--- a/packages/SettingsLib/ProgressBar/res/layout/progress_header.xml
+++ b/packages/SettingsLib/ProgressBar/res/layout/progress_header.xml
@@ -17,6 +17,8 @@
 
 <FrameLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:targetApi="25"
     android:layout_width="match_parent"
     android:layout_height="3dp">
     <View
diff --git a/packages/SettingsLib/RestrictedLockUtils/lint-baseline.xml b/packages/SettingsLib/RestrictedLockUtils/lint-baseline.xml
deleted file mode 100644
index 173c7353ae8c5..0000000000000
--- a/packages/SettingsLib/RestrictedLockUtils/lint-baseline.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<issues format="5" by="lint 4.1.0" client="cli" variant="all" version="4.1.0">
-
-    <issue
-        id="NewApi"
-        message="Call requires API level 23 (current min is 21): `android.content.Context#getSystemService`"
-        errorLine1="        ComponentName adminComponent = userContext.getSystemService("
-        errorLine2="                                                   ~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/RestrictedLockUtils/src/com/android/settingslib/RestrictedLockUtils.java"
-            line="59"
-            column="52"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="Call requires API level 23 (current min is 21): `android.content.Context#getSystemService`"
-        errorLine1="        UserManager um = context.getSystemService(UserManager.class);"
-        errorLine2="                                 ~~~~~~~~~~~~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/RestrictedLockUtils/src/com/android/settingslib/RestrictedLockUtils.java"
-            line="101"
-            column="34"/>
-    </issue>
-
-</issues>
diff --git a/packages/SettingsLib/RestrictedLockUtils/src/com/android/settingslib/RestrictedLockUtils.java b/packages/SettingsLib/RestrictedLockUtils/src/com/android/settingslib/RestrictedLockUtils.java
index a77e34b4af1e0..80f02b4ac0ee4 100644
--- a/packages/SettingsLib/RestrictedLockUtils/src/com/android/settingslib/RestrictedLockUtils.java
+++ b/packages/SettingsLib/RestrictedLockUtils/src/com/android/settingslib/RestrictedLockUtils.java
@@ -21,11 +21,13 @@ import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
+import android.os.Build;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.Settings;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
 
 import java.util.Objects;
 
@@ -34,10 +36,18 @@ import java.util.Objects;
  * support message dialog.
  */
 public class RestrictedLockUtils {
+    /**
+     * Get EnforcedAdmin from DevicePolicyManager
+     */
+    @RequiresApi(Build.VERSION_CODES.M)
     public static EnforcedAdmin getProfileOrDeviceOwner(Context context, UserHandle user) {
         return getProfileOrDeviceOwner(context, null, user);
     }
 
+    /**
+     * Get EnforcedAdmin from DevicePolicyManager
+     */
+    @RequiresApi(Build.VERSION_CODES.M)
     public static EnforcedAdmin getProfileOrDeviceOwner(
             Context context, String enforcedRestriction, UserHandle user) {
         if (user == null) {
@@ -73,6 +83,7 @@ public class RestrictedLockUtils {
     /**
      * Send the intent to trigger the {@code android.settings.ShowAdminSupportDetailsDialog}.
      */
+    @RequiresApi(Build.VERSION_CODES.M)
     public static void sendShowAdminSupportDetailsIntent(Context context, EnforcedAdmin admin) {
         final Intent intent = getShowAdminSupportDetailsIntent(context, admin);
         int targetUserId = UserHandle.myUserId();
@@ -97,6 +108,10 @@ public class RestrictedLockUtils {
         return intent;
     }
 
+    /**
+     * Check if current user is profile or not
+     */
+    @RequiresApi(Build.VERSION_CODES.M)
     public static boolean isCurrentUserOrProfile(Context context, int userId) {
         UserManager um = context.getSystemService(UserManager.class);
         return um.getUserProfiles().contains(UserHandle.of(userId));
diff --git a/packages/SettingsLib/SettingsSpinner/lint-baseline.xml b/packages/SettingsLib/SettingsSpinner/lint-baseline.xml
deleted file mode 100644
index ae1ed38e9288c..0000000000000
--- a/packages/SettingsLib/SettingsSpinner/lint-baseline.xml
+++ /dev/null
@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<issues format="5" by="lint 4.1.0" client="cli" variant="all" version="4.1.0">
-
-    <issue
-        id="NewApi"
-        message="Call requires API level 23 (current min is 21): `new android.widget.Spinner`"
-        errorLine1="        super(context, attrs, defStyleAttr, defStyleRes, mode, null);"
-        errorLine2="        ~~~~~">
-        <location
-            file="frameworks/base/packages/SettingsLib/SettingsSpinner/src/com/android/settingslib/widget/settingsspinner/SettingsSpinner.java"
-            line="122"
-            column="9"/>
-    </issue>
-
-</issues>
diff --git a/packages/SettingsLib/SettingsSpinner/src/com/android/settingslib/widget/settingsspinner/SettingsSpinner.java b/packages/SettingsLib/SettingsSpinner/src/com/android/settingslib/widget/settingsspinner/SettingsSpinner.java
index 0be80a9fd4660..14286fa76d8ac 100644
--- a/packages/SettingsLib/SettingsSpinner/src/com/android/settingslib/widget/settingsspinner/SettingsSpinner.java
+++ b/packages/SettingsLib/SettingsSpinner/src/com/android/settingslib/widget/settingsspinner/SettingsSpinner.java
@@ -17,9 +17,12 @@
 package com.android.settingslib.widget.settingsspinner;
 
 import android.content.Context;
+import android.os.Build;
 import android.util.AttributeSet;
 import android.widget.Spinner;
 
+import androidx.annotation.RequiresApi;
+
 import com.android.settingslib.widget.R;
 
 /**
@@ -117,6 +120,7 @@ public class SettingsSpinner extends Spinner {
      * @see Spinner#MODE_DIALOG
      * @see Spinner#MODE_DROPDOWN
      */
+    @RequiresApi(Build.VERSION_CODES.M)
     public SettingsSpinner(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes,
             int mode) {
         super(context, attrs, defStyleAttr, defStyleRes, mode, null);