Check NETWORK_SETTINGS permission for getAllNetworkStateSnapshots

This is declared in the API surface, but the implementation
does not match.

Test: atest CtsNetTestCases:android.net.cts.ConnectivityManagerTest#testGetAllNetworkStateSnapshots
Bug: 188140631

Merged-In: I3c2563d4ae4e3715d0c6270344ba8f7ef067872f
Merged-In: I97aa69651461ebe5c323ec669372f9a61b84e6a6
Change-Id: I97aa69651461ebe5c323ec669372f9a61b84e6a6
  (cherry-picked from ag/14601670)
1 file changed