Merge "Fix WindowInsets#getStableInsets" into tm-dev am: 06b93cf9 am: 84d46c31 am: 4852e118

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17691529



Change-Id: I3a8a922903599f0e9ff2baa484202e77470788d3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>