Merge "Fix IME callback not unregistered when IME is up during an IMM client...

Merge "Fix IME callback not unregistered when IME is up during an IMM client switch." into tm-dev am: 43572500 am: de9e6dd5 am: 51e7c953

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18699773



Change-Id: I915277abe818ef21349a660d1da93fd06f563131
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>