Merge "Enabling New Insets API with Multi-Session IME." into rvc-dev am: 09419a8129 am: 185a6d154e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11802630

Change-Id: Iba50c280dd5ac80705d4686a3dfcc575eef2303c