Implemented workaround for ObjectAL crash on iOS backend

There's an ObjectAL issue that appears if you switch back and forth between apps that utilize sound.  On occasion, ObjectAL could crash.  See here for the workaround: https://groups.google.com/forum/?fromgroups=#!topic/objectal-for-iphone/ubRWltp_i1Q for details.

This pull request includes:
- ObjectAL updates for the assembly and .jar file (exposed forceEndInterruption method)
- Update to IOSApplication, implementing the workaround