Merge "Check if NetworkSpecifier is an instance of MatchAllNetworkSpecifier" am: ec3f650de7 am: b82753716e am: dbc70f90c7

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I1f7bafc63926c7c68c7c3cdd13069234487888fa