Expand android.permission.WRITE_THEMES to system|signature

Change-Id: I5dd3dc7ea09276227a47f72f8a1c1f312354ddb8
Add API for protected SMS receive broadcasts.

  - Allows an application to receive an sms (usually for auth
  or registration) from whitelisted addresses, without broadcasting
  to any other listeners.

  - Allows an application to modify the whitelisted addresses within
  System.Secure settings.

Change-Id: I5dfeb94832eefac9607070e9fb29db589bac7a57
SystemUI: Utilize TextureView for CameraTile.

  SurfaceView causes unecessary and confusing view bleeding
  when the camera preview is about to begin. Utilize TextureView
  to display the content stream which behaves better within the
  QuickSettingsTile's container.

Change-Id: I408545ea92e29ab2cf4760b097ecf0cea4d813c9
Start autofocus only when we have a previewframe.

  - No quicksettings tile should be allowed to take down
  SystemUi. Thus, we need to handle a sporadic RuntimeException
  being thrown because the underlying camera ABI may be a bit dated.

Change-Id: I4d87bee0827a1133a6fb59c893d1fca124546471