Add GNSS VTS test for GnssDebug position values

sanity check.

Bug: 36567271

Test: vts-tradefed run commandAndExit vts \
--skip-all-system-status-check \
--primary-abi-only --skip-preconditions -l VERBOSE \
--module VtsHalGnssV1_0Target

Change-Id: I4fc2caf757743481f84ee1ec679082842c46adbd