Merge "Notify dispatcher when its configuration needs to be updated" into udc-dev am: cb0109ed am: 5c943e8b am: 214433f2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22760950



Change-Id: I82e23d3143ddccd64cfe1fcaec799ee553dfd350
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>