Enhanced Stability During Sessions (v2.0.4)

We occasionally receive reports of Hedy sessions stopping for unknown reasons (not including Android terminations). These occurrences are hard to recreate and pin down.

To help get ahead of these issues, we've been reworking the session management and session recovery logic. Our hope is that these improvements will reduce or eradicate these issues. In particular, we've reduced the instances where Hedy would end a session due to issues and instead increased recovery and retry logic.