[CTS][PASSPOINT] Update the check for passpoint network for preloaded passpoint network

Before calling the testAddPasspointConfigWithCertCredential
we need to check number of network already present in device

Bug: 67630919
Test: android.server.cts.CtsNetTestCases, WifiManagerTest
Change-Id: If643ab7bde760a65e9a5b1e9d47af53378a178fd
1 file changed
tree: 59be354e010f9cf95aaa3d0cbbf9b1ff92fcacd6
  1. tests/