Disable auto-backup for Settings App

- we dont want Settings data to be backed-up so add
android:allowBackup="false" to the AndroidManifest

Change-Id: I1165a37ecdd18c6a6526ce8b9a9576d9bbfd415b
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index c8362f0..8d2bb1b 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -75,7 +75,8 @@
             android:theme="@style/Theme.Settings"
             android:hardwareAccelerated="true"
             android:requiredForAllUsers="true"
-            android:supportsRtl="true">
+            android:supportsRtl="true"
+            android:allowBackup="false">
 
         <!-- Settings -->