This introduces a small new feature for ScaleAnimation allowing
the scaling factor to be expressed as a percentage of the object
(which is the same as the existing float interpretation), a
percentage of the container, or a fixed dimension. Maybe not
useful for anything else, but I needed it for this.
Also fix a bug in how transformation matrices were propagated
from the Animation to Surface Flinger, so that rotate and skew
animations will actually work. :p
Change-Id: I301f4caa2147aa35564b5e511cb9c0b368d2425d
Lots of work for no visible change in behavior, but now we can
do some fancier stuff...
Also allow rotation in all 4 directions.
Change-Id: I7e5e9537c5e359f69b83c10f65cc1ce95f371461
