Camera: Add documentation for set-watchdog to camera service commands

Test: check "adb shell cmd media.camera" output
Bug: 292453023
Change-Id: I8062f23e4384f0d9e46c0e278e396642173d9acc
diff --git a/services/camera/libcameraservice/CameraService.cpp b/services/camera/libcameraservice/CameraService.cpp
index 4757a42..e1eb0ac 100644
--- a/services/camera/libcameraservice/CameraService.cpp
+++ b/services/camera/libcameraservice/CameraService.cpp
@@ -5889,6 +5889,8 @@
         "  clear-stream-use-case-override clear the stream use case override\n"
         "  set-zoom-override <-1/0/1> enable or disable zoom override\n"
         "      Valid values -1: do not override, 0: override to OFF, 1: override to ZOOM\n"
+        "  set-watchdog <VALUE> enables or disables the camera service watchdog\n"
+        "      Valid values 0=disable, 1=enable\n"
         "  watch <start|stop|dump|print|clear> manages tag monitoring in connected clients\n"
         "  help print this message\n");
 }