MP4: unify container box parsing and expand container box support

[klirktag]

Background

MP4 files cosists of a tree of boxes. That means there are two different kinds of boxes: Container boxes and Leaf boxes. The Leaf boxes are the boxes that contains data, and the Container boxes contains other boxes. All container boxes in the MP4 files works exactly the same way, they just have different content. Before this PR all the container boxes had it's own duplicated implementation for each container box name

What this PR does

After this PR, all the container boxes are defined in an array called CONTAINER_BOX_TYPES

This array is used to check against to detect container boxes, and then all the contianer boxes uses exactly the same parser code.

This PR greatly simplifies the code by providing the same feature of parsing container boxes, but with much less code. Also adding new container boxes is much easier now

Additional container boxes

Since it is now much easier to support new container boxes then before, it also adds support for many new container boxes that are in the ISO/MP4 standard. This is done easily by just adding them to the CONTAINER_BOX_TYPES array

New boxes supported that was not supported before this PR:
mvex, moof, traf, mfra - fragmented MP4
udta, meta, ilst - metadata
meco - additional metadata
tref, trgr - track references/grouping
sinf, schi, ipro - content protection
iprp, ipco, iref, grpl - item properties/references (HEIF)
clip, matt - QuickTime legacy
strk, strd - sub track