SurfaceFlinger: Dont show Animation on External Display

- With this change the animation effect will not be shown on
  external display.
- It will change from portrait to landscape in one shot.
- Primary would still continue the animation effect
- set property sys.disable_ext_animation to disable animation

Change-Id: Ibd94bf166f08eeab1d504afe69230f7c6a617eb6
CRs-fixed: 453747
(cherry picked from commit 2435bb907b32a7931a2860b7fa984d2e705b5ed1)
(cherry picked from commit 04886a20e6547d12b20f45265fc6ae431b0f9efd)
(cherry picked from commit c6933cb180e67e159a01a75fd36dc8aaaf8b891f)