cleanup libui’s includes

- remove unneeded includes
- include a cpp’s header first in all cpps


Test: compiled & booted
Bug: 35164655
Change-Id: I0890913fcc6614cce156aff19fccdef183145beb
diff --git a/libs/ui/GraphicBuffer.cpp b/libs/ui/GraphicBuffer.cpp
index b544426..37ebfb3 100644
--- a/libs/ui/GraphicBuffer.cpp
+++ b/libs/ui/GraphicBuffer.cpp
@@ -16,18 +16,10 @@
 
 #define LOG_TAG "GraphicBuffer"
 
-#include <stdlib.h>
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <utils/Errors.h>
-#include <utils/Log.h>
-
-#include <ui/GrallocMapper.h>
 #include <ui/GraphicBuffer.h>
+#include <ui/GrallocMapper.h>
 #include <ui/GraphicBufferAllocator.h>
 #include <ui/GraphicBufferMapper.h>
-#include <ui/PixelFormat.h>
 
 namespace android {