Set exclusion region based on drag resizability not task resizability

As unresizeable apps can now be drag resized.

Flag: NONE(bug fix)
Fixes: 368079684
Test: manual
Change-Id: I9a68cb360531eab90b5a1196f9f3739e68299bd3
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecoration.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecoration.java
index bcad4633..e47ebea 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecoration.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DesktopModeWindowDecoration.java
@@ -1374,7 +1374,7 @@
      */
     private Region getGlobalExclusionRegion() {
         Region exclusionRegion;
-        if (mDragResizeListener != null && mTaskInfo.isResizeable) {
+        if (mDragResizeListener != null && isDragResizable(mTaskInfo)) {
             exclusionRegion = mDragResizeListener.getCornersRegion();
         } else {
             exclusionRegion = new Region();