[watsonstt] initial contribution (#12161)

* [watsonstt] initial contribution

Signed-off-by: Miguel Álvarez Díez <miguelwork92@gmail.com>

bundles/org.openhab.voice.watsonstt/NOTICE

@@ -0,0 +1,20 @@
+This content is produced and maintained by the openHAB project.
+
+* Project home: https://www.openhab.org
+
+== Declared Project Licenses
+
+This program and the accompanying materials are made available under the terms
+of the Eclipse Public License 2.0 which is available at
+https://www.eclipse.org/legal/epl-2.0/.
+
+== Source Code
+
+https://github.com/openhab/openhab-addons
+
+== Third-party Content
+ 
+com.ibm.watson: speech-to-text
+* License: Apache 2.0 License
+* Project: https://github.com/watson-developer-cloud/java-sdk
+* Source: https://github.com/watson-developer-cloud/java-sdk/tree/master/speech-to-text