SF: Move frontend code to frontend namespace

Fixes: b/259553365
Test: presubmit
Change-Id: I47338ec3e8d151e09b3c22c0544ba948dc25b98d
diff --git a/services/surfaceflinger/DisplayDevice.h b/services/surfaceflinger/DisplayDevice.h
index afa13e5..4b64aab 100644
--- a/services/surfaceflinger/DisplayDevice.h
+++ b/services/surfaceflinger/DisplayDevice.h
@@ -45,7 +45,7 @@
 #include "DisplayHardware/DisplayMode.h"
 #include "DisplayHardware/Hal.h"
 #include "DisplayHardware/PowerAdvisor.h"
-#include "FrontEnd/FrontEndDisplayInfo.h"
+#include "FrontEnd/DisplayInfo.h"
 #include "Scheduler/RefreshRateSelector.h"
 #include "ThreadContext.h"
 #include "TracedOrdinal.h"
@@ -167,7 +167,7 @@
     void setDisplayName(const std::string& displayName);
     const std::string& getDisplayName() const { return mDisplayName; }
 
-    surfaceflinger::FrontEndDisplayInfo getFrontEndInfo() const;
+    surfaceflinger::frontend::DisplayInfo getFrontEndInfo() const;
 
     /* ------------------------------------------------------------------------
      * Display power mode management.