Skip checking display windowing mode if TDA is null

This CL fixes the crash issue in CTS which uses non-trusted virtual
displays.
Such a display is not “organized” by the DisplayOrganizer so
DisplayAreaInfo can be null.

Bug: 380441549
Flag: EXEMPT bug fix
Test: com.android.test.input.UinputRecordingIntegrationTests
Change-Id: I91eed17c6fd23cad9dd1aaeab5bd541503338b34
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt b/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt
index d5a2a40..e4dd9f8 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/DesktopTasksController.kt
@@ -361,8 +361,15 @@
         }
 
         val tdaInfo = rootTaskDisplayAreaOrganizer.getDisplayAreaInfo(displayId)
-        requireNotNull(tdaInfo) {
-            "This method can only be called with the ID of a display having non-null DisplayArea."
+        // A non-organized display (e.g., non-trusted virtual displays used in CTS) doesn't have
+        // TDA.
+        if (tdaInfo == null) {
+            logW(
+                "forceEnterDesktop cannot find DisplayAreaInfo for displayId=%d. This could happen" +
+                    " when the display is a non-trusted virtual display.",
+                displayId,
+            )
+            return false
         }
         val tdaWindowingMode = tdaInfo.configuration.windowConfiguration.windowingMode
         val isFreeformDisplay = tdaWindowingMode == WINDOWING_MODE_FREEFORM