Merge "Turn ENABLE_PIP_APP_ICON_OVERLAY on by default" into tm-qpr-dev am: d2d4b4c2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21614504



Change-Id: I625b5314e6af10f88979038e1af095f6833139ec
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>