Merge "Reset Divider IME state when leaving split-screen" into rvc-dev am: 45e23b280b am: 50ec2f9c3d am: 0d7686bffe am: 6ec6dfa623

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12151562

Change-Id: I217a0d158ad4ae36337cee7d8aef1d1152a6a003