[SES-4096] - Audio notes improvement (#1289)

Author: SessionHero01

app/src/main/java/org/session/libsession/utilities/MediaTypes.kt

@@ -5,7 +5,7 @@ object MediaTypes {
     const val IMAGE_JPEG        = "image/jpeg"
     const val IMAGE_WEBP        = "image/webp"
     const val IMAGE_GIF         = "image/gif"
-    const val AUDIO_AAC         = "audio/aac"
+    const val AUDIO_MP4         = "audio/mp4"
     const val AUDIO_UNSPECIFIED = "audio/*"
     const val VIDEO_UNSPECIFIED = "video/*"
     const val VCARD             = "text/x-vcard"

app/src/main/java/org/thoughtcrime/securesms/attachments/AttachmentServer.java

@@ -125,14 +125,14 @@ fun recordAudio(
 
                 try {
                     val file by lazy {
-                        File.createTempFile("audio_recording_", ".aac", context.cacheDir)
+                        File.createTempFile("audio_recording_", ".m4a", context.cacheDir)
                     }
 
                     recorder.setAudioSource(MediaRecorder.AudioSource.MIC)
                     recorder.setAudioChannels(1)
                     recorder.setAudioSamplingRate(44100)
                     recorder.setAudioEncodingBitRate(32000)
-                    recorder.setOutputFormat(MediaRecorder.OutputFormat.AAC_ADTS)
+                    recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4)
                     recorder.setOutputFile(file)
                     recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC)
                     recorder.setOnErrorListener { _, what, extra ->