Location Wi-Fi scanning should not be turned off when the screen turns off. Bug: 113876483 Test: Run CTS, manually toggle location Wi-Fi scanning off right after the screen turns on and observe failure. Test: Run CTS with location Wi-Fi scanning initially turned off and observe failure. Test: Run CTS with location Wi-Fi scanning initially turned on and observe success. Change-Id: I092a3854b6365de72c2cfe38a55a0e1cedfcabd9