Merge "Ignore back invoke when window focus has lost" into tm-qpr-dev am: 14768734 am: 6ce8c4a9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19291068



Change-Id: I928da7e6e5907b7bafbdec85e92b8bc7f056afbf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>