Merge "Revert "Cleanup IME window visibility flag logic"" into udc-qpr-dev am: f7a56fbd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23813063



Change-Id: Iefe3d1c1ed6740ea9c1811eddd8e82cd1fd291db
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>