Improve Task user event logging

Bug: 79539824
Bug: 79541772

(1) Added page index of the TASK that is being launched
(2) Covers all three cases of task launch (tap, swipe down, quick scrub)
UserEvent: action:FLING direction=DOWN
UserEvent:  Source child:TASK, packageHash=-1598699687, componentHash=1952702153, pageIdx=0

UserEvent: action:DRAGDROP
UserEvent:  Source child:TASK, packageHash=-744307622, componentHash=-515832044, pageIdx=4

(3) Avoid double logging (When onStop is called, it is not logged if
the cause of onStop is APP or TASK launch)

Change-Id: Ic5db7d6a640d43bfb5cd667b49e37dd0ed127d5c

quickstep/src/com/android/quickstep/views/TaskView.java

@@ -110,13 +110,6 @@ public class TaskView extends FrameLayout implements TaskCallbacks, PageCallback
 
     public TaskView(Context context, AttributeSet attrs, int defStyleAttr) {
         super(context, attrs, defStyleAttr);
-        setOnClickListener((view) -> {
-            if (mTask != null) {
-                launchTask(true /* animate */);
-                BaseActivity.fromContext(context).getUserEventDispatcher().logTaskLaunchOrDismiss(
-                        Touch.TAP, Direction.NONE, TaskUtils.getComponentKeyForTask(mTask.key));
-            }
-        });
         setOutlineProvider(new TaskOutlineProvider(getResources()));
     }