feat: Add onRecordingStart listener

app/src/main/java/app/myzel394/alibi/ui/models/AudioRecorderModel.kt

@@ -56,6 +56,7 @@ class AudioRecorderModel :
         if (service.state == RecorderState.IDLE) {
             service.clearAllRecordings()
             service.startRecording()
+            onRecordingStart()
         }
 
         recorderState = service.state

app/src/main/java/app/myzel394/alibi/ui/models/BaseRecorderModel.kt

@@ -46,6 +46,7 @@ abstract class BaseRecorderModel<I, B : BatchesFolder, T : IntervalRecorderServi
     // If `isSavingAsOldRecording` is true, the user is saving an old recording,
     // thus the service is not running and thus doesn't need to be stopped or destroyed
     var onRecordingSave: (isSavingAsOldRecording: Boolean) -> Unit = {}
+    var onRecordingStart: () -> Unit = {}
     var onError: () -> Unit = {}
     var onBatchesFolderNotAccessible: () -> Unit = {}
     abstract var batchesFolder: B?

app/src/main/java/app/myzel394/alibi/ui/models/VideoRecorderModel.kt

@@ -67,6 +67,7 @@ class VideoRecorderModel :
 
             service.clearAllRecordings()
             service.startRecording()
+            onRecordingStart()
         } else {
             isStartingRecording = false
         }