Merge "Update javadoc for setManagedSubscriptionsPolicy" into udc-dev am: c0fdac3dc7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23515474

Change-Id: I55f5cfc4764ca68f429661a9054bd0fc301580b9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>