Rename Stack to Task related terms (7/n)

- Renaming PinnedStack to PinnedTask
- Renaming DockedStack to DockedTask

Bug: 157876447
Test: presubmit
Change-Id: I51c10564647ed0d46eddc0c51a1ee06eef897e43

core/java/android/app/ITaskStackListener.aidl

@@ -60,9 +60,9 @@ oneway interface ITaskStackListener {
     void onActivityForcedResizable(String packageName, int taskId, int reason);
 
     /**
-     * Called when we launched an activity that dismissed the docked stack.
+     * Called when we launched an activity that dismissed the docked task.
      */
-    void onActivityDismissingDockedStack();
+    void onActivityDismissingDockedTask();
 
     /**
      * Called when an activity was requested to be launched on a secondary display but was not

core/java/android/app/TaskStackListener.java

@@ -43,7 +43,7 @@ public abstract class TaskStackListener extends ITaskStackListener.Stub {
 
     @Override
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
-    public void onActivityPinned(String packageName, int userId, int taskId, int stackId)
+    public void onActivityPinned(String packageName, int userId, int taskId, int rootTaskId)
             throws RemoteException {
     }
 
@@ -66,7 +66,7 @@ public abstract class TaskStackListener extends ITaskStackListener.Stub {
 
     @Override
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
-    public void onActivityDismissingDockedStack() throws RemoteException {
+    public void onActivityDismissingDockedTask() throws RemoteException {
     }
 
     @Override