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

Conflicts:
	packages/SystemUI/src/com/android/systemui/quicksettings/CameraTile.java