SF: Introduce DisplayModeController

DisplayModeController will centralize the logic and state for selecting
the DisplayMode of each physical display. For now, register a display's
DisplaySnapshot with DMC during configure, and move the creation of its
RefreshRateSelector to DMC::registerDisplay.

Bug: 241285876
Test: presubmit
Change-Id: I673914328bea64636b8bcd193e710131926334a5
diff --git a/services/surfaceflinger/Display/PhysicalDisplay.h b/services/surfaceflinger/Display/PhysicalDisplay.h
index ef36234..9b1f1ed 100644
--- a/services/surfaceflinger/Display/PhysicalDisplay.h
+++ b/services/surfaceflinger/Display/PhysicalDisplay.h
@@ -25,6 +25,7 @@
 #include <utils/StrongPointer.h>
 
 #include "DisplaySnapshot.h"
+#include "DisplaySnapshotRef.h"
 
 namespace android::display {
 
@@ -45,8 +46,7 @@
 
     // Transformers for PhysicalDisplays::get.
 
-    using SnapshotRef = std::reference_wrapper<const DisplaySnapshot>;
-    SnapshotRef snapshotRef() const { return std::cref(mSnapshot); }
+    DisplaySnapshotRef snapshotRef() const { return std::cref(mSnapshot); }
 
     bool isInternal() const {
         return mSnapshot.connectionType() == ui::DisplayConnectionType::Internal;