The goal is to simplify and abstract feature logic detection. Currently
lots of places depend on various calls to `shaka.util.Platform` and
mainteinance of this is hard & not easy to read.
By introducing device API ideally rest of the player logic would look
into device features instead of directly checking platform. Additionally
we can more easily cache needed values, so we won't have to parse user
agent several times anymore.
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Co-authored-by: Álvaro Velad Galván <ladvan91@hotmail.com>
Álvaro Velad Galván
Wojciech Tyczyński