Support 4K overlay displays.

Bug: 18241736
Change-Id: Ibd479f2ea47ed49a507e7265bdce83afc214b19c
diff --git a/services/core/java/com/android/server/display/LogicalDisplay.java b/services/core/java/com/android/server/display/LogicalDisplay.java
index 4823769..6efc99a 100644
--- a/services/core/java/com/android/server/display/LogicalDisplay.java
+++ b/services/core/java/com/android/server/display/LogicalDisplay.java
@@ -133,6 +133,8 @@
                 mInfo.overscanBottom = mOverrideDisplayInfo.overscanBottom;
                 mInfo.rotation = mOverrideDisplayInfo.rotation;
                 mInfo.logicalDensityDpi = mOverrideDisplayInfo.logicalDensityDpi;
+                mInfo.physicalXDpi = mOverrideDisplayInfo.physicalXDpi;
+                mInfo.physicalYDpi = mOverrideDisplayInfo.physicalYDpi;
             }
         }
         return mInfo;