SF: Move frontend code to frontend namespace

Fixes: b/259553365
Test: presubmit
Change-Id: I47338ec3e8d151e09b3c22c0544ba948dc25b98d
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 7c0926a..50e8e73 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -66,7 +66,7 @@
 #include "DisplayIdGenerator.h"
 #include "Effects/Daltonizer.h"
 #include "FlagManager.h"
-#include "FrontEnd/FrontEndDisplayInfo.h"
+#include "FrontEnd/DisplayInfo.h"
 #include "FrontEnd/LayerCreationArgs.h"
 #include "FrontEnd/TransactionHandler.h"
 #include "LayerVector.h"
@@ -121,6 +121,7 @@
 class ScreenCapturer;
 class WindowInfosListenerInvoker;
 
+using frontend::TransactionHandler;
 using gui::CaptureArgs;
 using gui::DisplayCaptureArgs;
 using gui::IRegionSamplingListener;
@@ -1367,7 +1368,7 @@
     } mPowerHintSessionMode;
 
     TransactionHandler mTransactionHandler;
-    display::DisplayMap<ui::LayerStack, FrontEndDisplayInfo> mFrontEndDisplayInfos;
+    display::DisplayMap<ui::LayerStack, frontend::DisplayInfo> mFrontEndDisplayInfos;
 };
 
 class SurfaceComposerAIDL : public gui::BnSurfaceComposer {