Adds settings item for quick affordances.

This is in Display > Lock screen. It reads "Buttons" and the summary
text below it is a comma delimited list of the names of the
currently-selected quick affordances.

Fix: 256662519
Test: Manual verification that the lock screen and wallet
items are gone and the new item is visible and clicking it opens the
Wallpaper & style settings screen

Change-Id: If3746b5d0eb8c61edb9378cdb217ca248b999944
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 564d5c2..c87835c 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -118,6 +118,7 @@
     <uses-permission android:name="android.permission.READ_SAFETY_CENTER_STATUS" />
     <uses-permission android:name="android.permission.SEND_SAFETY_CENTER_UPDATE" />
     <uses-permission android:name="android.permission.START_VIEW_APP_FEATURES" />
+    <uses-permission android:name="android.permission.ACCESS_KEYGUARD_QUICK_AFFORDANCES" />
 
     <application
             android:name=".SettingsApplication"