Retrieve WiFi detail test cases

1. fix test case failure
2. remove redundant test cases

Bug: 130640128
Test: make RunSettingsRoboTests -j32 ROBOTEST_FILTER=com.android.settings.wifi.details.WifiDetailPreferenceControllerTest
Change-Id: Ia59287d7f9adb37a6b56301a2178b6e307fd892d
1 file changed