Only run ConnectivityDiagnosticsManagerTest as AppModeFull. am: 7c9d2128de am: d155cba9da am: 72a7f5b3c9

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/11904000

Change-Id: I0c67472d30188603ac0942411ad95c394cf24afd
tree: 77175e8c8254f7498908ced130155f810db017dc
  1. tests/