WIP: #133 - Added video render mode option

Description

Issue number -> #133 (closed)

This plugin didn't have video render mode option. It's useful to select mode by users. I prepared three render mode

• Fill // The fill mode. In this mode, the SDK stretches or zooms the video to fill the display window.
• Hidden // Uniformly scale the video until it fills the visible boundaries (cropped). One dimension of the video may have clipped contents.
• Fit // Uniformly scale the video until one of its dimension fits the boundary (zoomed to fit).

Demo

I placed a half-height, full-width sizedbox in the center, and placed the Twilio view inside it. The following table is the results of render mode options. As you can see, only the android VideoScaleType.ASPECT_BALANCED does not work properly. I tried many things to solve that problem, but no solution was found. If anyone knows how to solve it, please advise me.

Mode	iOS	Android
Fill
Hidden
Fit

Checklist

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• I read the Contributor Guide and followed the process outlined there for submitting MRs.
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  • And when a Twilio SDK is upgraded I also mentioned this in the CHANGELOG.md
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Breaking Change

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• Yes, this is a breaking change (please indicate a breaking change in CHANGELOG.md and increment major revision).
• No, this is not a breaking change.

Related Issues

#113 (closed)