Add gps_debug.conf module

Copy the gps_debug.conf from the device-specific folders to
a place closer to the code that uses it.

Bug: 112879252
Bug: 120066492
Test: make
Change-Id: I937e699cb9e891c511ca7b9f4740d45e19668c54
Merged-In: I937e699cb9e891c511ca7b9f4740d45e19668c54
Exempt-From-Owner-Approval: cp from internal
(cherry picked from commit 11905c6b)