cts: fix p2p cts test cases

p2p does not use NetworkInfo.isAvailable() anymore.
Remove this obsolete check.

Bug: 148164038
Bug: 148561948
Test: atest android.net.wifi.cts.ConcurrencyTest
Change-Id: I544a2363d85ea47e404e481d4d285b9fd6b38eb5
1 file changed