Merge "Check if NetworkSpecifier is an instance of MatchAllNetworkSpecifier" am: ec3f650de7 am: b82753716e

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1556546

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I061c38c83eedf9235d85c4353e88b72117d93b86