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
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
Don't assume any ringtone is present on external storage.

If that assumption doesn't hold true, the user will lose his ringtone
and won't know why.

Change-Id: I89409e1351792d020c5458f5104f4bb9f2a040f2