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

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



Change-Id: I9d078262839f145097117ae7447a1f31de7090b6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>