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: 8dd20d76 am: 5d3c8b14

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



Change-Id: I1c189d18a7bba977d1f298dd8744529a67c0207d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>