Fix split divider position issue

ag/13463021 missed a case to convert for leashing.
Also, fixed logic typo in setSideStageVisibility

Bug: 168505645
Test: adb shell dumpsys activity service SystemUIService WMShell setSideStageVisibility false
Change-Id: Iaba1f25d457d0211d43364bb6885ba688fea3790

libs/WindowManager/Shell/src/com/android/wm/shell/common/split/SplitWindowManager.java

@@ -39,6 +39,7 @@ import android.view.IWindow;
 import android.view.LayoutInflater;
 import android.view.SurfaceControl;
 import android.view.SurfaceControlViewHost;
+import android.view.SurfaceSession;
 import android.view.WindowManager;
 import android.view.WindowlessWindowManager;
 
@@ -55,6 +56,7 @@ public final class SplitWindowManager extends WindowlessWindowManager {
     private final ParentContainerCallbacks mParentContainerCallbacks;
     private Context mContext;
     private SurfaceControlViewHost mViewHost;
+    private SurfaceControl mLeash;
     private boolean mResizingSplits;
     private final String mWindowName;
 
@@ -88,7 +90,15 @@ public final class SplitWindowManager extends WindowlessWindowManager {
 
     @Override
     protected void attachToParentSurface(IWindow window, SurfaceControl.Builder b) {
-        mParentContainerCallbacks.attachToParentSurface(b);
+        // Can't set position for the ViewRootImpl SC directly. Create a leash to manipulate later.
+        final SurfaceControl.Builder builder = new SurfaceControl.Builder(new SurfaceSession())
+                .setContainerLayer()
+                .setName(TAG)
+                .setHidden(false)
+                .setCallsite("SplitWindowManager#attachToParentSurface");
+        mParentContainerCallbacks.attachToParentSurface(builder);
+        mLeash = builder.build();
+        b.setParent(mLeash);
     }
 
     /** Inflates {@link DividerView} on to the root surface. */
@@ -118,9 +128,15 @@ public final class SplitWindowManager extends WindowlessWindowManager {
      * hierarchy.
      */
     void release() {
-        if (mViewHost == null) return;
-        mViewHost.release();
-        mViewHost = null;
+        if (mViewHost != null){
+            mViewHost.release();
+            mViewHost = null;
+        }
+
+        if (mLeash != null) {
+            new SurfaceControl.Transaction().remove(mLeash).apply();
+            mLeash = null;
+        }
     }
 
     void setResizingSplits(boolean resizing) {
@@ -139,6 +155,6 @@ public final class SplitWindowManager extends WindowlessWindowManager {
      */
     @Nullable
     SurfaceControl getSurfaceControl() {
-        return mViewHost == null ? null : getSurfaceControl(mViewHost.getWindowToken());
+        return mLeash;
     }
 }

libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java

@@ -156,7 +156,7 @@ class StageCoordinator implements SplitLayout.LayoutChangeListener,
     }
 
     void setSideStageVisibility(boolean visible) {
-        if (!mSideStageListener.mVisible == visible) return;
+        if (mSideStageListener.mVisible == visible) return;
 
         final WindowContainerTransaction wct = new WindowContainerTransaction();
         mSideStage.setVisibility(visible, wct);