Add a void* user data parameter to DvrTrackingSensorsStart.

So that the client can pass a user data pointer to the callback.

Bug: 78173127
Test: Run dvr_tracking-test on device.
Change-Id: Id3e977069a5b9a9f2ad8316c61aee227ebdd6e34
(cherry picked from commit c3fc600b9ead16a39e589ce8e6f635204922b0a6)
diff --git a/libs/vr/libdvr/dvr_tracking.cpp b/libs/vr/libdvr/dvr_tracking.cpp
index 31ebc51..77a9438 100644
--- a/libs/vr/libdvr/dvr_tracking.cpp
+++ b/libs/vr/libdvr/dvr_tracking.cpp
@@ -38,8 +38,8 @@
   ALOGE("dvrTrackingSensorsDestroy is not implemented.");
 }
 
-int dvrTrackingSensorsStart(DvrTrackingSensors*,
-                            DvrTrackingSensorEventCallback) {
+int dvrTrackingSensorsStart(DvrTrackingSensors*, DvrTrackingSensorEventCallback,
+                            void*) {
   ALOGE("dvrTrackingStart is not implemented.");
   return -ENOSYS;
 }