feat: Send client key in the connect operation

[JoshuaBradbury]

For parse setups that use a client key, the live query client will never connect appropriately as the android library doesn't pass in the client key.

See: https://github.com/parse-community/ParseLiveQuery-iOS-OSX/pull/136

[mtrezza]

Thanks for this PR, it even includes a test - amazing! Let's wait for another review, and when the CI passes, it should be good to merge.

Unfortunately this repo has not been upgraded to auto-release yet and still uses TravisCI. That's something we have to look into as well to release a version with this feature. See https://github.com/parse-community/ParseLiveQuery-Android/issues/122

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