Add FLAG_ROTATES_WITH_CONTENT flag on created virtual display

Add rotate with content flag to prevent the virtual display created
in emulator can goes into pillar box when app rotation.
This change also make the virtual display looks more like normal usage.

Bug: 139362893
Test: build and run emulator
Change-Id: I84ca73a4d89ee3d8bf308d2be74e94d89e58222d
diff --git a/MultiDisplayProvider/src/com/android/emulator/multidisplay/MultiDisplayService.java b/MultiDisplayProvider/src/com/android/emulator/multidisplay/MultiDisplayService.java
index 608b590..923b94b 100644
--- a/MultiDisplayProvider/src/com/android/emulator/multidisplay/MultiDisplayService.java
+++ b/MultiDisplayProvider/src/com/android/emulator/multidisplay/MultiDisplayService.java
@@ -45,6 +45,7 @@
     private static final int DEL = 2;
     private static final int mFlags = DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC |
                                       DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY |
+                                      DisplayManager.VIRTUAL_DISPLAY_FLAG_ROTATES_WITH_CONTENT |
                                       1 << 6 |//DisplayManager.VIRTUAL_DISPLAY_FLAG_SUPPORTS_TOUCH
                                       1 << 9; //DisplayManager.VIRTUAL_DISPLAY_FLAG_SHOULD_SHOW_SYSTEM_DECORATIONS;
     private DisplayManager mDisplayManager;