Merge "Mark stylus buttons mapppings as fallback" into main am: f45ca2ce2d

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2896380

Change-Id: I2d4c73ce7ac8be9119c4fab6af6b89f2aeeca6e3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>