Search Bar: Fix sw720dp layout

Change-Id: I6b649a54ede5bb9a263e16865f8448142aa9f1d0
AppsCustomize: Remove white background

Change-Id: If2dd8a2eaea3d9b27fe317011a9d75b7d50a7b9c
AppsCustomizeLayout: Set background color

Change-Id: I83236a93fee82677417859cf4f301aec838b6e28
AndroidManifest: Add DEFAULT category to preferences

Change-Id: I46176dc23d9c6f933d2c6e3621b7c8eea41cbdb5