Merge "Show a toast upon stylus button click or keyboard shortcut when the...

Merge "Show a toast upon stylus button click or keyboard shortcut when the default note app is set to none." into udc-dev am: 7250ff26 am: 4e23bd06

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22609341



Change-Id: I792ce842df94531833db058e411880db9ec6058a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>