修改switch的问题轨迹颜色

[jiakoo]

由于 onTintColor 是deprecated，
会产生选中之后 再不选中轨迹颜色消失的BUG，
所以修改成为 trackColor的 api

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[BANG88]

color 是 string 所以不能直接给trackColor 赋值。 另外这个修改需要兼容之前的版本

[BANG88]

非常感谢你的PR，麻烦修复一下CI报错的问题。