feat(android): Add WebColor utility for parsing color

[thomasvidas]

Under package main.java.com.getcapacitor.util;

Uses Color.parseColor under the hood but allows the user to specify an ColorFormat. Right now only RGB, RGBA and ARGB are supported. But it would be cool to add something like HSV or HSL in the future.

Fixes #3903 (but will require changes to a bunch of the plugins)

[jcesarmobile]

On iOS users can use RGB or RGBA indistinctly, so this should behave the same way.
Instead of having the param for the format, it should only accept the HEX color string, check the length and consider it RGB or RGBA based on it.
And I think iOS also accepts with and without #

[imhoffd]

Summary of slack conversation: don't extend Color (just a simple parseColorRGBA(String) -> int), ignore Android color names (hopefully we didn't document support for those anywhere... and if we do accept color names, we should use this list, not Android's)

[carlpoole]

Looks good

[thomasvidas]

I will merge this when the plugin PR goes up later today