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.
(cherry picked from commit 0246363b223f539ad01898b8ad0093fc6a58c5a3)
Change-Id: I3a3f7ae94b818b81550137c375adc9bf7ce3da99
7c030eddbc