Bug 997288 - Add select tab button to "New [private] tab opened" toasts. r=wesj
Bug 1009327 - Add "manual connect" to Android about:devices page. r=mfinkle
Bug 998700 - Animate sync icon during refresh of Remote Tabs panel. r=lucasr

It turns out that animation-list can be combined with rotate to avoid
shipping extra bitmaps, and twelve frames is smooth enough.  This patch
takes that approach.

The trickiest part is exposing the icon drawable in a reasonable way to
the inner PanelView.