Merge "Update OoB TalkBack tutorial with appropriate description of holding...

Merge "Update OoB TalkBack tutorial with appropriate description of holding down volume buttons" into udc-dev am: 9e1a8aff

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21611427



Change-Id: I44e50651499d25d4fdcd8361c5478509c6d22ccc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>