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/GrallocMapper.cpp b/libs/ui/GrallocMapper.cpp
index b9e9040..6884dcb 100644
--- a/libs/ui/GrallocMapper.cpp
+++ b/libs/ui/GrallocMapper.cpp
@@ -16,11 +16,9 @@
 
 #define LOG_TAG "GrallocMapper"
 
-#include <array>
-#include <string>
+#include <ui/GrallocMapper.h>
 
 #include <log/log.h>
-#include <ui/GrallocMapper.h>
 
 namespace android {