fix missing include

Test: built
Bug: 36603618
Change-Id: I836e2458203600768aa199f243206d5e0d9d4d39
diff --git a/media/libstagefright/omx/SoftVideoEncoderOMXComponent.cpp b/media/libstagefright/omx/SoftVideoEncoderOMXComponent.cpp
index c49403d..4be6a09 100644
--- a/media/libstagefright/omx/SoftVideoEncoderOMXComponent.cpp
+++ b/media/libstagefright/omx/SoftVideoEncoderOMXComponent.cpp
@@ -33,6 +33,8 @@
 #include <ui/GraphicBufferMapper.h>
 #include <ui/Rect.h>
 
+#include <hardware/gralloc.h>
+
 #include <OMX_IndexExt.h>
 
 namespace android {