Fix the flipping animation sometimes being played when pulling the quick
settings with two fingers.

Commit c5e8dca7f11d3c085dd1e98692fcc21f1bcc0f6f already tried to fix
this before, but was incomplete (and incorrect). The actual issue is
that on the first pointer down event, a 'peek' animation runs and
expands the notification panel by some pixels (on mako: 160). This
amount of pixels is significantly larger than the handle height (on
mako: 72). Depending on the timing between peek animation and the second
pointer down event, the flip animation would play (if animation already
revealed more than 72 pixels) or not.

Fix that by not playing the flip animation if only peeking, as the
actual panel content is not visible at that point anyway. Also remove
the previous incomplete fix in the process.

Change-Id: I8997dc7b70143940a519f41da29ffd4d738d8d0c