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
Merge branch 'kitkat' of https://github.com/crdroidandroid/android_frameworks_base into kitkat