Merge "Remove IME surface when occured in multi-window mode" into rvc-dev am: b55bc82d13 am: c56f6b53b7

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

Change-Id: I6ff08fc32ff843de23631e621a69fe9d6d3c218a