Resource overlays cannot reference resources that only exist within the
overlay package, so using resources with aapt tags is not possible.
Breaking up these resources to not use appt tags is fairly error prone,
so instead we're including lockscreen animations for all themes in
SystemUI and selecting them at runtime.
Fixes: 118757654
Test: make; change themes and view animations
Change-Id: I4b489bbe94dbb4b351470e7d00bf4be6a5da5280
