Merge "Register VolumeDialogImpl dumpable." into tm-qpr-dev am: b2ab9d9433 am: 6cfbbf7415

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20542889

Change-Id: I3783ebb5189e71fe9b886edf10c3076e783c2461
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>