Merge "Move posting logic from PerDisplay to DisplayWIndowInsetsControllerImpl." into rvc-qpr-dev am: b20f69a4cc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13787577

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iece35f528e5384b596806ce99bb5dd2caf2e68c6