Making the behavior deterministic when the IME picker is shown.

In the language & input settings, the auxiliary IME subtypes have been
hidden since they should not be a default.  With Id156c85535a22, now we
can explicitly control the behavior of input method picker.
Note the this CL should not change any user visible behaviors.

Bug: 20763994
Change-Id: I9f797d07ba02363fab58ceb9aecb3cc11fbc407e
3 files changed