Merge "Synchronize PIP menu fade out with task dismiss" into sc-dev am: 83c75ac7 am: c60faca8 am: a8bf4800

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14355997

Change-Id: I408e661f76b1cae6263f4f7ffd1a001a5dace0be