Merge "Fix black frame when unfold animation starts" into tm-qpr-dev am: 9e41a090

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20638521



Change-Id: I3e6ac550ba224c90307167239fe76fbf4a5bf576
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>