Camera: Disallow dumping clients directly

Camera service dumps should only be initiated through
ICameraService::dump.

Bug: 26265403
Change-Id: If3ca4718ed74bf33ad8a416192689203029e2803
diff --git a/services/camera/libcameraservice/CameraService.h b/services/camera/libcameraservice/CameraService.h
index b56c161..3905d62 100644
--- a/services/camera/libcameraservice/CameraService.h
+++ b/services/camera/libcameraservice/CameraService.h
@@ -84,6 +84,9 @@
     // Default number of messages to store in eviction log
     static const size_t DEFAULT_EVENT_LOG_LENGTH = 100;
 
+    // Event log ID
+    static const int SN_EVENT_LOG_ID = 0x534e4554;
+
     // Implementation of BinderService<T>
     static char const* getServiceName() { return "media.camera"; }
 
@@ -189,7 +192,10 @@
             return mRemoteBinder;
         }
 
-        virtual status_t    dump(int fd, const Vector<String16>& args) = 0;
+        // Disallows dumping over binder interface
+        virtual status_t      dump(int fd, const Vector<String16>& args);
+        // Internal dump method to be called by CameraService
+        virtual status_t      dumpClient(int fd, const Vector<String16>& args) = 0;
 
         // Return the package name for this client
         virtual String16 getPackageName() const;