Bootanimation: Use custom Boot animation name sys prop

Add a new option to boot animation to be able to define a custom name for a boot animation zip file located inside product/media following the pattern used with the light and dark themed animations.

Bug: 343704035
Test: On device test
Change-Id: Iae2df3c272d5ca03b9029aeefe78afddb494c6ad
1 file changed