DvrTrackingSensors related functionality in DVR.

Bug: 78173127
Test: Run dvr_tracking-test on device.
Change-Id: I73209fce007b20c77c6169dea93c71735f0e830f
diff --git a/libs/vr/libdvr/dvr_tracking.cpp b/libs/vr/libdvr/dvr_tracking.cpp
index 5479491..31ebc51 100644
--- a/libs/vr/libdvr/dvr_tracking.cpp
+++ b/libs/vr/libdvr/dvr_tracking.cpp
@@ -29,6 +29,26 @@
   return -ENOSYS;
 }
 
+int dvrTrackingSensorsCreate(DvrTrackingSensors**, const char*) {
+  ALOGE("dvrTrackingSensorsCreate is not implemented.");
+  return -ENOSYS;
+}
+
+void dvrTrackingSensorsDestroy(DvrTrackingSensors*) {
+  ALOGE("dvrTrackingSensorsDestroy is not implemented.");
+}
+
+int dvrTrackingSensorsStart(DvrTrackingSensors*,
+                            DvrTrackingSensorEventCallback) {
+  ALOGE("dvrTrackingStart is not implemented.");
+  return -ENOSYS;
+}
+
+int dvrTrackingSensorsStop(DvrTrackingSensors*) {
+  ALOGE("dvrTrackingStop is not implemented.");
+  return -ENOSYS;
+}
+
 }  // extern "C"
 
 #endif  // DVR_TRACKING_IMPLEMENTED