Allow setting new values for mock speed and bearing in GNSS HAL

Bug: None
Test: lshal debug android.hardware.gnss@2.1::IGnss/default location bea=30 spd=40
      on Cuttlefish instance
Change-Id: Ib954ba44720627e54e69aa29b0a744f203a65704
diff --git a/gnss/common/utils/default/include/MockLocation.h b/gnss/common/utils/default/include/MockLocation.h
index cd8cb5d..0bfdd1a 100644
--- a/gnss/common/utils/default/include/MockLocation.h
+++ b/gnss/common/utils/default/include/MockLocation.h
@@ -27,6 +27,8 @@
 extern float gMockLatitudeDegrees;
 extern float gMockLongitudeDegrees;
 extern float gMockAltitudeMeters;
+extern float gMockBearingDegrees;
+extern float gMockSpeedMetersPerSec;
 
 }  // namespace common
 }  // namespace gnss