[CB-3991] Added unit tests for Media plugin
[CB-3991] Added unit tests for Media plugin

Reviewed by Jeffrey Heifetz <jheifetz@blackberry.com>
Tested by Tracy Li <tli@blackberry.com>

apache/cordova-blackberry,apache/cordova-blackberry,corimf/cordova-blackberry,blackberry/cordova-blackberry,corimf/cordova-blackberry,apache/cordova-blackberry,corimf/cordova-blackberry,blackberry/cordova-blackberry,blackberry/cordova-blackberry