619 restructure local storage (#628)

* To MMKV migration working

* POC migrated font size settings

* Moved settings to mmkv

* Fix typos

* Migrated contexts slice

* Migrated app slice

* POC instance emoji update

* Migrated drafts

* Migrated simple instance properties

* All migrated!

* Re-structure files

* Tolerant of undefined settings

* Can properly logging in and out including empty state

src/utils/startup/audio.ts

@@ -0,0 +1,14 @@
+import { Audio, InterruptionModeAndroid, InterruptionModeIOS } from 'expo-av'
+import log from './log'
+
+const audio = () => {
+  log('log', 'audio', 'setting audio playback default options')
+  Audio.setAudioModeAsync({
+    interruptionModeIOS: InterruptionModeIOS.DoNotMix,
+    interruptionModeAndroid: InterruptionModeAndroid.DoNotMix,
+    playsInSilentModeIOS: true,
+    staysActiveInBackground: false
+  })
+}
+
+export default audio