Added audio recording function

[WZWren]

• Audio Recording uses the expo-av library, which stores the Recording object in a Context. This allows the state of the Recording to be stored between pages.
• The Recording is uploaded to the Supabase server. It can be played back on the Details page.
• TODO: This Recording, and Close Contact requests, as well as alert data, does not retroactively update while you are on the details page. We will add a listener for this by the next commit.