Cannot play mp4 file with major brand 'wmf'

Problem: Major brand 'wmf' is not in compatible array, so mp4
file with major brand 'wmf' is not recognized as mp4.

Solution: add 'wmf' to compatible array

Bug: 123051965
Test: play mp4 file whose ftyp major brand is 'wmf' and check
if it can be played normally

Change-Id: I9ff1411c01aa89d5bc35d85f6bc2ee07d37545e3