Assigning a static like this is dangerous.  It should either be synchronized on a lock, or the entire method should be synchronized (essentially synchronizing on this, or the class for a static method).

Not a huge deal in this app, but, if we had a Service of some type, or anything that is reporting analytics on a different thread, we could hit a case where two threads are trying to set ``mTracker`` at the same time.  That would be bad.