Merge "Remove some functions @hide in WindowContainerTransaction" into tm-dev am: 34e18413 am: 8f8a1331

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17741151



Change-Id: I8991cf11a10f0e0194190432d094738893a4e1ca
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>