Merge "Remove IME surface when occured in multi-window mode" into rvc-dev am: b55bc82d13 am: 13212d164e am: a2351f080f am: a79d150a3a

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

Change-Id: Iecbbe8110ef58be2a452a97c4394f6362bde19ee