Merge "Transfer IME callbacks when app's focused root view changes." into tm-dev am: f1548098 am: 40f337ea am: 76bf9ac1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18417321



Change-Id: I16b0c21e206b89a9f6f0a3cc8a075e614af59513
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>