Merge "Prevent IMEs from switching to another IME that isn't enabled" into tm-qpr-dev am: 1b2695237b am: c869e4778b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21342766

Change-Id: Ie44dca2cb0a5ea555dca98e029680093f8c69d20
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>