Switch keyboard shortcuts helper to daynight theme

This one was hardcoded to use light theme, switch it to daynight
so that it switches properly in dark theme. Also the text colors
were hardcoded so I fixed that as well.

Test: visual inspection
Bug: 114520166
Change-Id: Ic4789d0dfec7a7af4a49b37909ee0827ea1554bc

packages/SystemUI/res/layout/keyboard_shortcut_app_item.xml

@@ -39,7 +39,7 @@
             android:layout_height="wrap_content"
             android:paddingEnd="12dp"
             android:paddingBottom="4dp"
-            android:textColor="@color/ksh_keyword_color"
+            android:textColor="?android:attr/textColorPrimary"
             android:textSize="16sp"
             android:maxLines="5"
             android:singleLine="false"

packages/SystemUI/res/values/colors.xml

@@ -129,7 +129,6 @@
 
     <!-- Keyboard shortcuts colors -->
     <color name="ksh_application_group_color">#fff44336</color>
-    <color name="ksh_keyword_color">#d9000000</color>
     <color name="ksh_key_item_color">@color/material_grey_600</color>
     <color name="ksh_key_item_background">@color/material_grey_100</color>
 

packages/SystemUI/src/com/android/systemui/statusbar/KeyboardShortcuts.java

@@ -128,7 +128,8 @@ public final class KeyboardShortcuts {
     private KeyCharacterMap mBackupKeyCharacterMap;
 
     private KeyboardShortcuts(Context context) {
-        this.mContext = new ContextThemeWrapper(context, android.R.style.Theme_DeviceDefault_Light);
+        this.mContext = new ContextThemeWrapper(
+                context, android.R.style.Theme_DeviceDefault_Settings);
         this.mPackageManager = AppGlobals.getPackageManager();
         loadResources(context);
     }