Merge \"Fixing issue with screen pinning screen not showing for secondary users.\" into nyc-dev

am: 9a75ed7ab5

Change-Id: I8dffa83fc2f3cb031062412171453dc7d19a2e66

packages/SystemUI/src/com/android/systemui/recents/RecentsSystemUser.java

@@ -30,6 +30,7 @@ import com.android.systemui.recents.events.EventBus;
 import com.android.systemui.recents.events.activity.DockedTopTaskEvent;
 import com.android.systemui.recents.events.activity.RecentsActivityStartingEvent;
 import com.android.systemui.recents.events.ui.RecentsDrawnEvent;
+import com.android.systemui.recents.misc.ForegroundThread;
 
 /**
  * An implementation of the system user's Recents interface to be called remotely by secondary
@@ -78,12 +79,16 @@ public class RecentsSystemUser extends IRecentsSystemUserCallbacks.Stub {
 
     @Override
     public void updateRecentsVisibility(boolean visible) {
-        mImpl.onVisibilityChanged(mContext, visible);
+        ForegroundThread.getHandler().post(() -> {
+            mImpl.onVisibilityChanged(mContext, visible);
+        });
     }
 
     @Override
     public void startScreenPinning(int taskId) {
-        mImpl.onStartScreenPinning(mContext, taskId);
+        ForegroundThread.getHandler().post(() -> {
+            mImpl.onStartScreenPinning(mContext, taskId);
+        });
     }
 
     @Override

packages/SystemUI/src/com/android/systemui/recents/ScreenPinningRequest.java

@@ -72,7 +72,12 @@ public class ScreenPinningRequest implements View.OnClickListener {
     }
 
     public void showPrompt(int taskId, boolean allowCancel) {
-        clearPrompt();
+        try {
+            clearPrompt();
+        } catch (IllegalArgumentException e) {
+            // If the call to show the prompt fails due to the request window not already being
+            // attached, then just ignore the error since we will be re-adding it below.
+        }
 
         this.taskId = taskId;