Merge "Transfer IME callbacks when app's focused root view changes." into tm-dev am: f1548098 am: 6f576e26

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



Change-Id: I0182a45e387b71e81f0b362d23078abae3e19407
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>