According to the public documentation of WifiInfo.getSSID(), the returned value can be one of the following: 1. Hex digits if the SSID cannot be decoded as UTF-8. 2. String surrounded by double quotes if the SSID can be decoded as UTF-8. 3. <unknown ssid>, if not connected. Fix the test to check for all these 3 string values. BUG: 31272462 TEST: The failing CTS test passes now. Change-Id: I26e12d28994e3cdb4cd1bd9e999633b327ad5830