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

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



Change-Id: I405cce20c86e88e1480bfacc747c6e57961ff760
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>