Summary: This should in theory never happen since the state of the recording is also managed within the UI. However, it's better to ensure that if `startRecording` is called twice, without calling `stopRecording` first it will error rather than leak a recording (the first process will still run but the object representing it is oprhaned)
Reviewed By: passy
Differential Revision: D33913298
fbshipit-source-id: f8fa6b0e4fdbdf4282633fa29a736d3e7dedf3bb
3a9c875e03