Bug 3365937 notify TTS initialization listener of binding errors

The creation of a TextToSpeech object causes the TTS service to
 start, and the initialization listener to be called when the
 service is connected. But the listener is never called when
 the service binding failed to be notified of this error.
The fix consists in checking the result of the bind to service
 operation, and notify the listener in case of an error.

More log was added in case speak() and synthesizeToFile() are
 called but the service is not known to have started.

Change-Id: I7dcc1fa44be31fee3177ec6215fca3306377b934