Hide Wi-Fi Scanning message when Location is disabled (QS Internet Dialog)

- When the location is disabled, the WiFi scanning service will also
stop.

- Bypass the WifiManager#isScanAlwaysAvailable() result.

Bug: 203471614
Test: manual test on the device.
atest -c InternetDialogControllerTest \
         InternetDialogTest

Change-Id: I2f159820d577f226e640b3ea735f6b18c52a16f7