Merge "Remove IME surface when occured in multi-window mode" into rvc-dev am: b55bc82d13 am: 13212d164e am: a2351f080f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11612967

Change-Id: I2fa284f6f456ea528a4d15fe2ac01c4457d10c8b