cameraserver: log setTorchMode calls.

Bug: 120314037

Test: Turn torch on / off; logcat | grep 'Torch turned'
Test: Turn torch on / off; adb shell dumpsys media.camera

Change-Id: Ib98e8847f49c6977b9cba65ae0605b8abe774a15
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
diff --git a/services/camera/libcameraservice/CameraService.h b/services/camera/libcameraservice/CameraService.h
index a8c2606..b8cec2c 100644
--- a/services/camera/libcameraservice/CameraService.h
+++ b/services/camera/libcameraservice/CameraService.h
@@ -748,6 +748,11 @@
             const char* reason);
 
     /**
+     * Add an event log message when a client calls setTorchMode succesfully.
+     */
+    void logTorchEvent(const char* cameraId, const char *torchState, int clientPid);
+
+    /**
      * Add an event log message that the current device user has been switched.
      */
     void logUserSwitch(const std::set<userid_t>& oldUserIds,