Enlarge the onAvailable callback timeout to 30 seconds

Sometimes the device may take a long time to connect to the wifi,
try to enlarge the timeout to lower the fail rate of test.

Bug: 157391946
Test: atest CtsHostsideNetworkTests:com.android.cts.net.HostsideNetworkCallbackTests
Change-Id: Ie89936ecc2d70ee22dd312067ccedd2523e81855
1 file changed
tree: 5b24fdad8bb6cb01ced5a73c8cbc6c00df9622bd
  1. tests/