Enable checks for MANAGE_TEST_NETWORKS in TestNetworkService

This commit re-enables enforcement of the MANAGE_TEST_NETWORK
permission, which is only granted to the shell. CTS tests using this
permission should use UiAutomation.adoptShellPermissionIdentity() to
gain access.

Bug: 72950854
Test: IPsec CTS tests using this passing
Change-Id: I98573a5c68e45abbbaddef01f6ac74a6a18e26f9
1 file changed
tree: 6c949fcbd88139eb19d9dd8538276071f68f0fb3
  1. core/
  2. services/
  3. tests/