Ensure EditorInfo#locales is set before return.

This is a follow up CL for the previous CL [1], which mistakenly put
the initialization code of EditorInfo#locales after return statement.

  [1]: I77db5b99a7cf745d800db75baf135bb60ad04820
       8d6eeb01

With this CL, the IME starts receiving correctly initialized LocaleList
as expected.

Bug: 22859862
Change-Id: I738ffaaf07091d8b980f8bfc6e16227fcb85a96a