Merge "Ensure PipTransitionController initializes in order" into tm-qpr-dev am: 38517434

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19539262



Change-Id: If3379556251f5eb976fde5695856e72e54c9de14
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>