am 3574de1c: Remove vestigial references to StringUtf8Micro.

Merge commit '3574de1ca8301e1e13d1c89f2e2a902499d6bae9' into gingerbread-plus-aosp

* commit '3574de1ca8301e1e13d1c89f2e2a902499d6bae9':
  Remove vestigial references to StringUtf8Micro.