Only allow resizeable Activity to create TaskFragment

TaskFragment is usually occupied a portion of the owner Task.
Using a non-resizable Activity limits the ability to resize
Activity within TaskFragment. This CL prohibits non-resizeable
Activity to create TaskFragment.

Test: TaskFragmentOrganizerPolicyTests
Bug: 199689901
Change-Id: I10ebfc90de1b571466b048400696061df1bc0206

services/core/java/com/android/server/wm/WindowOrganizerController.java

@@ -1177,6 +1177,12 @@ class WindowOrganizerController extends IWindowOrganizerController.Stub
             sendTaskFragmentOperationFailure(organizer, errorCallbackToken, exception);
             return;
         }
+        if (!ownerActivity.isResizeable()) {
+            final IllegalArgumentException exception = new IllegalArgumentException("Not allowed"
+                    + " to operate with non-resizable owner Activity");
+            sendTaskFragmentOperationFailure(organizer, errorCallbackToken, exception);
+            return;
+        }
         // The ownerActivity has to belong to the same app as the root Activity of the target Task.
         final ActivityRecord rootActivity = ownerActivity.getTask().getRootActivity();
         if (rootActivity.getUid() != ownerActivity.getUid()) {