Create the EventReceiver with the right display Id

The current context will almost always have the default display, we need
to create the EventReceiver with the displayId of the display it is
handling.

For testing, open a freeform window on a secondary display with the dev
option `Force Desktop Mode` (this registers an EventReceiver) and try
drag the app handle.

Bug: 352316177
Flag: EXEMPT bug fix
Test: Manual (see description)
Change-Id: I0f2ac32996bf356c8840d4974b98d70967aa00fb
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModel.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModel.java
index faf6a62..d12b906 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModel.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecorViewModel.java
@@ -1040,7 +1040,7 @@
     private void createInputChannel(int displayId) {
         final InputManager inputManager = mContext.getSystemService(InputManager.class);
         final InputMonitor inputMonitor =
-                mInputMonitorFactory.create(inputManager, mContext);
+                mInputMonitorFactory.create(inputManager, displayId);
         final EventReceiver eventReceiver = new EventReceiver(inputMonitor,
                 inputMonitor.getInputChannel(), Looper.myLooper());
         mEventReceiversByDisplay.put(displayId, eventReceiver);
@@ -1194,8 +1194,8 @@
     }
 
     static class InputMonitorFactory {
-        InputMonitor create(InputManager inputManager, Context context) {
-            return inputManager.monitorGestureInput("caption-touch", context.getDisplayId());
+        InputMonitor create(InputManager inputManager, int displayId) {
+            return inputManager.monitorGestureInput("caption-touch", displayId);
         }
     }