This changes makes the initial, default language set and
the #setLanguage call with the default language as input
exactly the same.
Previously, the requests made after the initial default language
set were missing the name of the default voice.
+ Some tests clean-up. Some of them fail due to issues with
Locale#toLanguageTag upper-casing the variant field.
Change-Id: I5470617007fe45462b7198bf62a03eb5fe47a590
fd80746bb9