Add loopable EDU lottie files and convert to light theme manually.

These new assets are better at looping than the previous ones.

Followed go/sysui-illustration-eng to map from dark to light colors
programmatically. Handling the mapping in code is preferred over having
separate lottie assets for light and dark theme.

Test: Manual
Bug: 263157739
Change-Id: Ia3cd2a1e7d349188d182d796ba927f1c513d4716