[VBLOCKS-3454] Quickstart Refactor

[afalls-twilio]

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[ocarevs]

Found two issues we might consider addressing with this PR.
Hold, mute and disconnect buttons disappear when screen is rotated. I believe this is the same case in the master branch.
Calling with dead token and immediately disconnecting, before UI updates because of Connect failure, app will crash with NullPointerException with this check here
Other than that LGTM.

[afalls-twilio]

@ocarevs Thanks for finding those bugs, they should be fixed now, along with some other issues that were not reported.