[automerger skipped] Merge "Ensure nav bar is not touchable when the IME is handling back" into tm-dev am: 71ac6f00 am: 674acfc0 -s ours

am skip reason: Merged-In I96126551112abdbee921ca7aee711b63899b6aa9 with SHA-1 f92a8c2f is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16942425

Change-Id: I9f06104a35ec3fc90ee72451d42fcae2f4d5f9af