Use config instead of local string for qr scanner

This is required so that a download can be triggered
for the required component if it not already present
on the device.

Test: Manually
Bug: 230319091
Change-Id: I1ecdd526c3616b98e268deb0959338f517c4f67b

core/res/res/values/config.xml

@@ -5660,6 +5660,9 @@
     <!-- Whether or not to enable the lock screen entry point for the QR code scanner. -->
     <bool name="config_enableQrCodeScannerOnLockScreen">false</bool>
 
+    <!-- Default component for QR code scanner -->
+    <string name="config_defaultQrCodeComponent"></string>
+
     <!-- Whether Low Power Standby is supported and can be enabled. -->
     <bool name="config_lowPowerStandbySupported">false</bool>
 

core/res/res/values/symbols.xml

@@ -4707,6 +4707,7 @@
 
   <java-symbol type="string" name="config_wearSysUiPackage"/>
   <java-symbol type="string" name="config_wearSysUiMainActivity"/>
+  <java-symbol type="string" name="config_defaultQrCodeComponent"/>
 
   <java-symbol type="dimen" name="secondary_rounded_corner_radius" />
   <java-symbol type="dimen" name="secondary_rounded_corner_radius_top" />

packages/SystemUI/res/values/defaults.xml

@@ -1,23 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-/**
- * Copyright (c) 2009, 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.
- */
--->
-<resources>
-    <!-- Default for SystemUiDeviceConfigFlags.DEFAULT_QR_CODE_SCANNER.
-    To be set if the device wants to support out of the box QR code scanning experience -->
-    <string name="def_qr_code_component" translatable="false"></string>
-</resources>

packages/SystemUI/src/com/android/systemui/qrcodescanner/controller/QRCodeScannerController.java

@@ -29,7 +29,6 @@ import android.provider.Settings;
 import android.util.Log;
 
 import com.android.internal.config.sysui.SystemUiDeviceConfigFlags;
-import com.android.systemui.R;
 import com.android.systemui.dagger.SysUISingleton;
 import com.android.systemui.dagger.qualifiers.Background;
 import com.android.systemui.settings.UserTracker;
@@ -119,7 +118,6 @@ public class QRCodeScannerController implements
         mSecureSettings = secureSettings;
         mDeviceConfigProxy = proxy;
         mUserTracker = userTracker;
-
         mConfigEnableLockScreenButton = mContext.getResources().getBoolean(
             android.R.bool.config_enableQrCodeScannerOnLockScreen);
     }
@@ -258,16 +256,20 @@ public class QRCodeScannerController implements
         }
     }
 
+    private String getDefaultScannerActivity() {
+        return mContext.getResources().getString(
+            com.android.internal.R.string.config_defaultQrCodeComponent);
+    }
+
     private void updateQRCodeScannerActivityDetails() {
         String qrCodeScannerActivity = mDeviceConfigProxy.getString(
                 DeviceConfig.NAMESPACE_SYSTEMUI,
                 SystemUiDeviceConfigFlags.DEFAULT_QR_CODE_SCANNER, "");
 
         // "" means either the flags is not available or is set to "", and in both the cases we
-        // want to use R.string.def_qr_code_component
+        // want to use R.string.config_defaultQrCodeComponent
         if (Objects.equals(qrCodeScannerActivity, "")) {
-            qrCodeScannerActivity =
-                    mContext.getResources().getString(R.string.def_qr_code_component);
+            qrCodeScannerActivity = getDefaultScannerActivity();
         }
 
         String prevQrCodeScannerActivity = mQRCodeScannerActivity;

packages/SystemUI/tests/src/com/android/systemui/qrcodescanner/controller/QRCodeScannerControllerTest.java

@@ -24,7 +24,6 @@ import static com.android.systemui.qrcodescanner.controller.QRCodeScannerControl
 import static com.google.common.truth.Truth.assertThat;
 
 import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -32,6 +31,7 @@ import static org.mockito.Mockito.when;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
+import android.content.res.Resources;
 import android.os.UserHandle;
 import android.provider.DeviceConfig;
 import android.provider.Settings;
@@ -41,7 +41,6 @@ import android.testing.TestableLooper;
 import androidx.test.filters.SmallTest;
 
 import com.android.internal.config.sysui.SystemUiDeviceConfigFlags;
-import com.android.systemui.R;
 import com.android.systemui.SysuiTestCase;
 import com.android.systemui.settings.UserTracker;
 import com.android.systemui.util.DeviceConfigProxyFake;
@@ -90,8 +89,9 @@ public class QRCodeScannerControllerTest extends SysuiTestCase {
         when(mPackageManager.queryIntentActivities(any(Intent.class),
                 any(Integer.class))).thenReturn(resolveInfoList);
         when(mPackageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA)).thenReturn(true);
-        mContext.getOrCreateTestableResources().addOverride(R.string.def_qr_code_component,
-                defaultActivity);
+        mContext.getOrCreateTestableResources().addOverride(
+                com.android.internal.R.string.config_defaultQrCodeComponent, defaultActivity);
+
         mContext.getOrCreateTestableResources().addOverride(
                 android.R.bool.config_enableQrCodeScannerOnLockScreen, enableOnLockScreen);