Cherry-pick two BufferItem changes

libcameraservice: Stop using IGBC::BufferItem
(cherry picked from commit 027c772ed30ddd32808df669e37a53e9b97b1f99)

libstagefright: Stop using IGBC::BufferItem
(cherry picked from commit 983e2be81f9ea767ae4d8b19669c1c080ecf58d4)
diff --git a/services/camera/libcameraservice/gui/RingBufferConsumer.cpp b/services/camera/libcameraservice/gui/RingBufferConsumer.cpp
index d0f29de..8cd6800 100644
--- a/services/camera/libcameraservice/gui/RingBufferConsumer.cpp
+++ b/services/camera/libcameraservice/gui/RingBufferConsumer.cpp
@@ -268,7 +268,7 @@
     return OK;
 }
 
-void RingBufferConsumer::onFrameAvailable(const android::BufferItem& item) {
+void RingBufferConsumer::onFrameAvailable(const BufferItem& item) {
     status_t err;
 
     {