add option to temporarily turn on WiFi when location is requested

It would be convenient to add an option to automatically and temporarily turn on the WiFi radio when location is requested if the WiFi radio was off at the time of the request. I normally keep my WiFi radio off to save battery, but have to activate it for location.

No file or test is named in the issue. Start by tracing the Android location-request entry point and how WiFi state is currently read or changed; define the option, temporary radio behavior, restoration when the request ends, and the test coverage needed before implementation.

Written by the indexing model from the issue text.