Avoid invalidating view during some outline invalidations

We were invalidating the view during outline invalidation far
too often. Sometimes, it's appropriate to invalidate the view when
the outline changes, but not when the outline is being invalidated
in the middle of drawing the view, which is done in reaction to a view
invalidation.

Issue #17460940 Volantis: panning in Calendar from month to month is only at 30fps

Change-Id: I7bdee17dc9c7df89d4cd3d781010823cef931222