Set mDragInProcess to false in onDragEnd.

Before this change, it was possible to touch (not drag and drop)
a Folder and have it open to a non-first page.

With this change, the Folder always opens to the first page on touch.
For drag and drop, it will still open to the last page.

Bug: 36022592
Change-Id: Ib0417eaf7e4866e874369b3b35248231a54cba06
1 file changed