Revert "Get theme info for current user instead of user 0"

This reverts commit c9413c4a0de83e53d3f3b56db2437d82ce6f335c.
Revert "ThemeUtils: Retain the original package name in themed UI context"

This reverts commit bbc37c758e4f15c7909ba4356da6fde52c354bce.