Merge "Reset Divider IME state when leaving split-screen" into rvc-dev am: 45e23b280b am: 0a2ada02f2 am: 4c17f946a3

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

Change-Id: I2335923976541eee8a95404ec6ab335a1c75dffc