Merge "Reset Divider IME state when leaving split-screen" into rvc-dev am: 45e23b280b am: 0a2ada02f2 am: 253ab122e9 am: e2494a9c90

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

Change-Id: I2423eb84aff4e20628169905d05e830db53c165e