Notify InputListener when there an changes to input devices am: e3da4bbc9c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/22497846

Change-Id: I57732ff11a5eaf3a4e8a78423c7fc1b7bc200534
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>