PlayerFactory use a Builder

[Mecharyry]

Problem

Lot's of "discussions" around the PlayerFactory when adding the DOWNGRADE_SECURE_DECODER because we passed a boolean all the way down instead of having two different method signatures.

Potential Solution

Use the Builder pattern, it's ideal when you want to customise something.

Impact

Extensible and we can provide easily visible defaults.

[Mecharyry]

Pass down MediaCodecSelector when doing this.

[ouchadam]

fixed by #57