Bug: 10918599
Shaves ~1.5MB off of Keyguard creation from usage of an
old-style Alpha animator that would create a draw cache
The animation is unseen due to screen timings, so simply remove it
Also adds a bit of de-jank to the non-svelte case by avoiding
a potential GC_FOR_ALLOC
Change-Id: Id49742d95988f670a44305e4033e7a850d20e675
da7af95d81