Add new style String operations during compilation init, part 2

This allows some class initializers that deal with Strings to run during
compilation. However, java.lang.Character.toUpperCase() is blocking
initialization for some parts.

(cherry picked from commit 57f91e89)

Bug: 21036900
Change-Id: Ia969c6a643f510bc798f94fb10bca1a68fe2ae67