Merge "Provide mechanism for on demand loading/unloading of connected plugins"...

Merge "Provide mechanism for on demand loading/unloading of connected plugins" into udc-dev am: 9b6df5a9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21990123



Change-Id: Ic85eb3f5127c132af270ce802ba66644404573a2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>