Generate --GSV sentences from SVs in view
instead of generate them from SVs used in fix
Change-Id: I1de113e86b987b6ea01b50d800e5e13e7277baff
CRs-Fixed: 2015049
NMEA generation logic needs to be reused across the
interface boundaries. Moved this logic inside utils.
Change-Id: Icb5c6fbc38b178c5edea468d26286e21749bfbfb
CRs-Fixed: 1098734