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/GrallocAllocator.cpp b/libs/ui/GrallocAllocator.cpp
index ca67990..5c5d5b3 100644
--- a/libs/ui/GrallocAllocator.cpp
+++ b/libs/ui/GrallocAllocator.cpp
@@ -16,9 +16,10 @@
 
 #define LOG_TAG "GrallocAllocator"
 
-#include <log/log.h>
 #include <ui/GrallocAllocator.h>
 
+#include <log/log.h>
+
 namespace android {
 
 namespace Gralloc2 {