- Because MpdBuilder no longer sets ContentProtection, live was broken.
- For key-rotation, <cenc:pssh> element is updated.
Change-Id: I45bb80a12faff39ccf5deb82439c0732ed9cea59
mp4 code was changed earlier which uses openssl in some way but the
dependency was not updated.
Issue: 15
Change-Id: Icababe00753f739832d61bc6792d95321cc59cf5