Summary:
In Android, only changed prop values are sent to the mounting layer via folly::dynamic maps. In the LayoutAnimation system, before this, we only sent that
map at the /end/ of the animation for any non-interpolated values (for example, image source is not interpolated so it was not updated until the end of the animation).
However, what we probably expect is that all non-interpolated values change immediately, and interpolated values smoothly transition. This diff makes that change on Android
by using the final RawProps as the /initial/ value that interpolations are stacked on.
Changelog: [Internal]
Reviewed By: mdvacca
Differential Revision: D25727483
fbshipit-source-id: e692d37b9965fedcdf429a81d60b7cb7f0c6abe1