Allows IndicatorView to have a different size than Settings Activity

The transparent IndicatorView need to be immersive fullscreen, while the
underneath activity should not cover the status bar or the nav bar.

Bug: 157747505
Test: Manual test to verify status bar and nav bar are visible.
Change-Id: I6d5a3f53dd3768524700c3e33135fa7dfde839f1
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 4f3caed..bd04d89 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -103,7 +103,8 @@
     <uses-permission android:name="android.permission.MEDIA_CONTENT_CONTROL" />
     <uses-permission android:name="android.permission.INSTALL_DYNAMIC_SYSTEM" />
     <uses-permission android:name="android.permission.BIND_CELL_BROADCAST_SERVICE" />
-
+    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
+    
     <application android:label="@string/settings_label"
             android:icon="@drawable/ic_launcher_settings"
             android:theme="@style/Theme.Settings"