gps: Move hal_gnss_pixel declaration to device folder am: 5ff76196c8

Original change: https://googleplex-android-review.googlesource.com/c/device/google/zuma-sepolicy/+/27576137

Change-Id: Ic16f628926a47350f0e0caf7293e1cfa4521a7fe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>