Camera3: Fix memory leak during frame reprocess

 The 'streamCbRoutine()' method of the reprocess
 channel receive a camera super frame that was
 previously allocated on heap and must release it
 after exit

Bug: 13301331

Change-Id: Ie90f6b4f945f4b7fcc6c46d541871e44c3f6943b
diff --git a/camera/QCamera2/HAL3/QCamera3Channel.cpp b/camera/QCamera2/HAL3/QCamera3Channel.cpp
index fcfed09..589d616 100755
--- a/camera/QCamera2/HAL3/QCamera3Channel.cpp
+++ b/camera/QCamera2/HAL3/QCamera3Channel.cpp
@@ -2162,6 +2162,7 @@
     }
     *frame = *super_frame;
     obj->m_postprocessor.processPPData(frame);
+    free(super_frame);
     return;
 }