Add proper namespace to GraphicTypes.

Renamed GraphicsTypes.h to GraphicTypes.h and added proper namespace to avoid
naming conflict.

BUG: 77156734
Test: Build and flash
Change-Id: Ibd9f454b5b72d5f8c6d94a3869a60a1bf821f106
diff --git a/libs/gui/tests/Surface_test.cpp b/libs/gui/tests/Surface_test.cpp
index df391ed..2c02ba6 100644
--- a/libs/gui/tests/Surface_test.cpp
+++ b/libs/gui/tests/Surface_test.cpp
@@ -42,6 +42,7 @@
 // retrieve wide-color and hdr settings from configstore
 using namespace android::hardware::configstore;
 using namespace android::hardware::configstore::V1_0;
+using ui::ColorMode;
 
 using Transaction = SurfaceComposerClient::Transaction;