Made the taskbar touchable during animation to home.

Enabled taskbar touch processing while animating to home. Also excluded
quick search bar from touch region, so it is not interactable during the
animation & removed corresponding TODO from TaskbarView.

Fixes: 368419997
Test: Manual. Enable gesture navigation. Open any application. Swipe up
to go to the launcher home screen. Click any taskbar icon - the
corresponding application will open. If clicking on Quick search,
launcher search will be opened. Video:
http://recall/-/gx8ASgewUeUS3QYohfrd1J/g6UWhF9dQZq3QsFyH0EwtK
Perform the same test for buttons navigation mode. Video:
http://recall/-/gx8ASgewUeUS3QYohfrd1J/gvuoSRnQfXQlejewBG1Ex8
Flag: EXEMPT bug fix

Change-Id: I07280bce70dd25d5ab78210302f08c0614309130

quickstep/src/com/android/launcher3/taskbar/TaskbarView.java

@@ -185,7 +185,6 @@ public class TaskbarView extends FrameLayout implements FolderIcon.FolderIconPar
                     resources.getDrawable(R.drawable.taskbar_overflow_icon));
             mTaskbarOverflowView.setPadding(mItemPadding, mItemPadding, mItemPadding, mItemPadding);
         }
-        // TODO: Disable touch events on QSB otherwise it can crash.
         mQsb = LayoutInflater.from(context).inflate(R.layout.search_container_hotseat, this, false);
 
         mMaxNumIcons = calculateMaxNumIcons();