Don't drop video frames but to release them.

bug - 3259009

Change-Id: Ib7634f10a7fe7b7ce7014b79b07957d194bae1a7
diff --git a/services/camera/libcameraservice/CameraService.cpp b/services/camera/libcameraservice/CameraService.cpp
index 535f07f..f1fa0ff 100644
--- a/services/camera/libcameraservice/CameraService.cpp
+++ b/services/camera/libcameraservice/CameraService.cpp
@@ -1015,7 +1015,10 @@
 
     sp<Client> client = getClientFromCookie(user);
     if (client == 0) return;
-    if (!client->lockIfMessageWanted(msgType)) return;
+    if (!client->lockIfMessageWanted(msgType)) {
+        client->releaseRecordingFrame(dataPtr);
+        return;
+    }
 
     if (dataPtr == 0) {
         LOGE("Null data returned in data with timestamp callback");