Making sure that the language, country, and variant defaults are always
set to something to ensure that there won't be an NPE.
Dismissing the ListPreference dialogs before a rotation to avoid list
data corruption caused by the list being displayed while its data is
being re-initialized.
Change-Id: Iecdb3b4d415542dc8a4db162c930e6a6570a55f2
example after checking that the data required by the TTS engine is
properly installed.
Removed use of local constants for the the default TTS values, use
the values defined in TextToSpeech.Engine instead.