Minor cleanups to TextToSpeech.
Minor cleanups to TextToSpeech.

(a) Fix an NPE reported when no TTS engine is installed.
(b) Fix a bad link, and some javadoc typos.

bug: 5004015
Change-Id: I38b97dbb5d7d4065a5ee408fae9138638ed48f40

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base