Migrate to using DefaultDisplay

- Remove extra binder calls to get the default display

Bug: 140633033
Change-Id: I532645deac101a6065d90484b87a67b67aa717f5
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index aa02441..92e9509 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -500,6 +500,8 @@
         // Load configuration-specific DeviceProfile
         mDeviceProfile = idp.getDeviceProfile(this);
         if (isInMultiWindowMode()) {
+            // Note: Calls to getSize() can't rely on our cached DefaultDisplay since it can return
+            // the app window size
             Display display = getWindowManager().getDefaultDisplay();
             Point mwSize = new Point();
             display.getSize(mwSize);