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

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



Change-Id: I9ca41cd13f39d3d0f5232e74cf69ad32a2141c35
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>