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: I3e69d40291715763ff64afd8129cd8655cb5c929
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>