Android updates

* [AEROGEAR-1526 - Update Android Support library version](https://issues.jboss.org/browse/AEROGEAR-1526)
* [AEROGEAR-1525 - Remove unnecessary dependencies](https://issues.jboss.org/browse/AEROGEAR-1525)
* [AEROGEAR-1524 - Change Android Maven Central stub to real Android library from Maven SDK deploy](https://issues.jboss.org/browse/AEROGEAR-1524)
* [AEROGEAR-1527 - Move gcm server and json simple from android bom to bom](https://issues.jboss.org/browse/AEROGEAR-1527)