The property ro.hardware.gps can be specifid to allow a single system
image to work with differrent GPS chips. The HAL layer will use it to load
/system/lib/hw/gps.<ro.hardware.gps>.so. Add support to GpsLocationProvider
to use the same property to find /etc/gps.<ro.hardware.gps>.conf, falling
back to /etc/gps.conf if the property is not set or the file is not present.
Change-Id: Ib285c4d28b0d0be5e038a1e61822edd8bc6d97d9
0246363b22