VTS: only assert that IGnssDebug present for non-automotive

VTS test VtsHalGnssV1_0Target#GnssHalTest.GetAllExtensions tests that
IGnss::getEnxtensionGnssDebug returns an actual extension. Make an
exception for automotive devices.

Bug: 143966170
Test: ran VtsHalGnssV1_0Target on Volvo IHU

Change-Id: I1588099a5be704c7869d6d5e8c0312d8b498bb95