Merge "Check for null mLeash before setting alpha." into tm-dev am: 1f9afd72...

Merge "Check for null mLeash before setting alpha." into tm-dev am: 1f9afd72 am: 05edfc28 am: 70bbad36 am: 4cf6922b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18585595



Change-Id: I45c0cde66b8cab1a5b7be36c7bcf54608f8274ad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>