Making second argument configurable in wallpaper intent function

Bug: 190080582
Test: Build and Flash on device
Change-Id: I1cc78622d4faaca0aec0be04c28e893eb9d2d0f0
diff --git a/res/values/config.xml b/res/values/config.xml
index 25911e6..d5629b5 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -87,6 +87,8 @@
 
     <!-- Default packages -->
     <string name="wallpaper_picker_package" translatable="false"></string>
+    <string name="custom_activity_picker" translatable="false">
+        com.android.customization.picker.CustomizationPickerActivity</string>
     <string name="local_colors_extraction_class" translatable="false"></string>
 
     <!-- Accessibility actions -->
diff --git a/src/com/android/launcher3/util/PackageManagerHelper.java b/src/com/android/launcher3/util/PackageManagerHelper.java
index 08ec591..f42d304 100644
--- a/src/com/android/launcher3/util/PackageManagerHelper.java
+++ b/src/com/android/launcher3/util/PackageManagerHelper.java
@@ -202,7 +202,8 @@
     public static Intent getStyleWallpapersIntent(Context context) {
         return new Intent(Intent.ACTION_SET_WALLPAPER).setComponent(
                 new ComponentName(context.getString(R.string.wallpaper_picker_package),
-                "com.android.customization.picker.CustomizationPickerActivity"));
+                    context.getString(R.string.custom_activity_picker)
+                ));
     }
 
     /**