libgui: Remove IGBC::BufferItem

Removes IGraphicBufferConsumer::BufferItem. Depends on the
following changes:
    I187b3a7d05196b6289596afac8fb9a9d4aebff76
    I0ddd38df37500cfd6b21d1e768ed14e39c5cd9fc

Change-Id: Id1fa56d092188f2cb712768d5d2fc6a9027fb73c
diff --git a/libs/gui/BufferQueue.cpp b/libs/gui/BufferQueue.cpp
index 61fd8c4..2fcbaf2 100644
--- a/libs/gui/BufferQueue.cpp
+++ b/libs/gui/BufferQueue.cpp
@@ -32,7 +32,7 @@
 BufferQueue::ProxyConsumerListener::~ProxyConsumerListener() {}
 
 void BufferQueue::ProxyConsumerListener::onFrameAvailable(
-        const android::BufferItem& item) {
+        const BufferItem& item) {
     sp<ConsumerListener> listener(mConsumerListener.promote());
     if (listener != NULL) {
         listener->onFrameAvailable(item);