Refactor TTS Android code to support jieba for Chinese TTS models (#800)

scripts/apk/build-apk-tts.sh.in

@@ -59,6 +59,11 @@ sed -i.bak s/"modelName = null"/"modelName = \"$model_name\""/ ./MainActivity.kt
   sed -i.bak s%"ruleFsts = null"%"ruleFars = \"$rule_fars\""% ./MainActivity.kt
 {% endif %}
 
+{% if tts_model.dict_dir %}
+  dict_dir={{ tts_model.dict_dir }}
+  sed -i.bak s%"dictDir = null"%"dictDir = \"$dict_dir\""% ./MainActivity.kt
+{% endif %}
+
 {% if tts_model.data_dir %}
   data_dir={{ tts_model.data_dir }}
   sed -i.bak s%"dataDir = null"%"dataDir = \"$data_dir\""% ./MainActivity.kt