PicoTTS: Set mNativeSynth prior to TextToSpeechService#onCreate

The variable mNativeSynth is used by TextToSpeechService#onCreate so it must be set prior
to that call. Otherwise, the method TextToSpeech#onIsLanguageAvailable will return
TextToSpeech.ERROR because the synthesizer is not ready.

Patch 2: Better comments
Patch 3: Add a comment for explain the getContentResolver() status after this change

Note: See https://android-review.googlesource.com/#/c/42578/ for the discussion about this
change

Change-Id: Ie211d54ee5a39eae721b7732eb3aaa01aed65a16
1 file changed