[3171580] don't automatically log GraphicBuffer allocation failures

some of these failures are not fatal and even expected in some cases
so they should not emit a dump in the log in those cases.

Change-Id: Idcfa252e3bfa9d74e27fe4ad8f8623aa01aa9c5e

include/ui/GraphicBuffer.h

@@ -88,12 +88,15 @@ public:
     status_t lock(uint32_t usage, const Rect& rect, void** vaddr);
     status_t lock(GGLSurface* surface, uint32_t usage);
     status_t unlock();
-    
+
     android_native_buffer_t* getNativeBuffer() const;
     
     void setIndex(int index);
     int getIndex() const;
 
+    // for debugging
+    static void dumpAllocationsToSystemLog();
+
 private:
     virtual ~GraphicBuffer();
 

include/ui/GraphicBufferAllocator.h

@@ -68,6 +68,7 @@ public:
     status_t free(buffer_handle_t handle);
 
     void dump(String8& res) const;
+    static void dumpToSystemLog();
 
 private:
     struct alloc_rec_t {