Fix broken subtitles line wrapping

[siankatabg]

Changes

Apparently I did a mistake using the ReplacementSpan for outlining the text as it doesn't support line wrapping, so lets remove it and do it with a custom TextView :)

Issues

#1303 broke subtitle line wrapping

[mueslimak3r]

I haven't dug into the details of your implementation so I won't comment on that yet.

But conceptually I'm a fan of having a custom textview for outlined text. This could be used to add outlines to other UI elements that need it, like the title/clock row in the playback overlay. Currently that can be difficult to read depending on what's on screen in a video.

[siankatabg]

That's exactly what I thought while doing it. Also easy to add extras as outlining colour and so on if needed at some point.

[nielsvanvelzen]

I've not tested this or the other PR but my preference goes to a custom view like this one does. I've done a quick initial review on the code.

[siankatabg]

From linter warning:

This TypedArray should be recycled after use with #recycle()

Sorry, I did it on a hurry yesterday and didn't even checked the warnings (the reason I didn't marked anything as resolved), I just came to review what I did and is left to be done, but you was first.
Anyway, your patience and the code quality you're trying to keep in this app is amazing, thank you!

[mueslimak3r]

I tested it with some videos/subtitles that clipped before and it works well!
I didn't spot any errors or find any new leaks (I did discover a leak but I checked that it was there before these recent subtitles-related changes).