Bootanimation: Fix up 720x1280

Bootanimation at some point got stretched...
And resized images from old backup...
No more stretch.

PS2: Set desc back to 800x1280.  Thought
that was an accident, but it indeed means
no stretching

Credit, as always, to bagheadinc for our
bootanimation-alt.zip

Change-Id: Ia0b99e9c21270cf41bc7ba12e9c55985de51fd37
Merge "Bootanimation: Fix up 720x1280" into jb-mr1