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: I8c0920c3ba84d20b033242a673dc24b50b563e3b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>