Merge "Allow Launcher to use PipContentOverlay" into tm-qpr-dev am: 98ef7be762

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21106077

Change-Id: Ia2ed2ac55ce9d0f656cbd29f9df88e0162d22cdf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>