Finally fix incorrect flipping to quick settings.

Commit f6685c5ca84a42f5a47bf40827d6229dd998dee4 fixed this for the
two-finger pulldown. It reverted commit
c5e8dca7f11d3c085dd1e98692fcc21f1bcc0f6f in the process, which was
incorrect, but fixed another condition of this problem occuring
nevertheless. The actual problem the latter fix tried to fix was that
the flip decision was dependant on the timing of the view layout:
getMeasuredHeight() returned whatever was set in the last layout, which
might not have happened when hiding the view, so at the time of the next
ACTION_DOWN getMeasuredHeight() returned the height from the time the
panel was last visible.
Fix that problem by using the height scheduled for the next layout, so
we're always up-to-date.

Change-Id: Ib97f34f9aa0a6f28d48b4ec3e16c82a814cda0d0
Bugfix : Quick pulldown sometimes flips when it should not

When your Quick Settings Panel is set to

Quick pulldown : right

Sometimes (very intermittently) the tray flips (to Quick Settings) as you pull it down from the right side.

This is happening because the pull down happened so fast you can see the top 0-10 pixels of the tray,
and because it was showing the notifications, not the Quick Settiings

However the user expects the tray not to flip, but to just be on the Quck Settings.

The new code simply checks to see that the Event was a pull down event and that the event started in the top status bar.
If this is the case, then the quick panel is swapped to (without flip)

Special Thanks to my daughter Jenny fo painstakingly reproducing this bug.

Change-Id: I8fdbedb1aa6d4fd672bd4cb58b7c99557469ab62