Narrowing class & user id for GNSS HAL

Bug: 36084078
Fixes: 36084078

Test: Delete-all GPS tests at desk - Xtra downloads fine
and GPS works

Change-Id: I58fa7d970178577cf177a337117b259dbd9fd266
diff --git a/gnss/1.0/default/android.hardware.gnss@1.0-service.rc b/gnss/1.0/default/android.hardware.gnss@1.0-service.rc
index 96638a3..1f6d13e 100644
--- a/gnss/1.0/default/android.hardware.gnss@1.0-service.rc
+++ b/gnss/1.0/default/android.hardware.gnss@1.0-service.rc
@@ -1,4 +1,4 @@
 service gnss_service /vendor/bin/hw/android.hardware.gnss@1.0-service
-    class main
-    user system
+    class hal
+    user gps
     group system gps