Merge "[pm] describe warning dialog behavior in javadoc" into udc-dev am: 416dd2e5 am: 71c937ec

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23438327



Change-Id: Ie584279e4825839293e7c16089ad79a9b86b63ef
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>