[geoclue-providers-hybris] add a gps callback that exists on some specific devices. JB#40318
[geoclue-providers-hybris] add a gps callback that exists on some specific devices. JB#40318

Can be enabled via

    #define USE_GPS_VENDOR_EXTENSION 1

in android-config.h (generated by droid-hal packaging).

mer-hybris/geoclue-providers-hybris,mer-hybris/geoclue-providers-hybris