Merge "Fix NPE in AccessNetworksManager" into tm-dev am: b6463ce4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/18105724



Change-Id: Ic363a5d0bf3006032a96f3cb0841594e5c0a6b94
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>