Stop treating reserve 0x41 object type as AAC.

It's not clear why this was ever treated as AAC, but the original code
addition included it.  0x41 is listed a reserved type in the specs.
There was no special handling of 0x41 in stagefright, so this doesn't
seem to be a compatibility carry-over from there, either.

See PR 126 for further rationale.

Author: kinetiknz

mp4parse/src/lib.rs

@@ -4068,7 +4068,7 @@ fn read_dc_descriptor(data: &[u8], esds: &mut ES_Descriptor) -> Result<()> {
     }
 
     esds.audio_codec = match object_profile {
-        0x40 | 0x41 | 0x66 | 0x67 => CodecType::AAC,
+        0x40 | 0x66 | 0x67 => CodecType::AAC,
         0x69 | 0x6B => CodecType::MP3,
         _ => CodecType::Unknown,
     };