Only run ConnectivityDiagnosticsManagerTest as AppModeFull. am: 7c9d2128de am: d155cba9da am: 72a7f5b3c9 am: ef8d66095c

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

Change-Id: Ic4f6cd08e22603db51f2238eed02921ed00b1542
tree: 46c135b76d2292520daf01bdcd64f1c734841455
  1. tests/