RESTRICT AUTOMERGE Revert "Let the system dialog honor FLAG_ALT_FOCUSABLE_IM" am: 96d77cba14

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21331000

Change-Id: I360365ca52be4e1b9b831e549638dc7b9dc6b8c5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>