Cannot play mov file with samr box

Problem: Cannot play mov file which has stsd->wave->samr.

Solution: delete the judge condition
"chunk_type == FOURCC('m','p','4','a')" to make other
audio type can play, not only mp4a can be played.

Bug: 123166627
Test: test with the file which has stsd->wave->samr and
check if it can be played normally.

Change-Id: I7816230af39d99b3f73085db04b8bd7acccd3a19