Switch to recyclerview in ManageApplications

- Replace ListView with RecyclerView in layout
- Replace ApplicationAdapter's superclass to be RecyclerView.Adapter
- Change adapter interfaces (where necessary) to work with RecyclerView
- Replace fast scroll with Recycler's mechanism (all in xml)
- Removed section indexer (text bubble when fast scroll) because
  recyclerview doesn't support it.

Bug: 64804294
Test: robotests
Change-Id: I55b221836ce6abdeddf4568c8a8a5632cbddbd3b

src/com/android/settings/display/AppGridView.java

@@ -16,8 +16,6 @@
 
 package com.android.settings.display;
 
-import com.android.settings.R;
-
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
@@ -30,6 +28,8 @@ import android.widget.ArrayAdapter;
 import android.widget.GridView;
 import android.widget.ImageView;
 
+import com.android.settings.R;
+
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;