Merge "Check whether StatusBar is initialized in ScreenOffAnimationController." into sc-dev am: 412a2d2c am: 278420dc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15054296

Change-Id: I602f1c91015b55b9a14452e08ffa0ae4eaa33969