[Weex-260][android]switch supports setting color

[whn9527]

Hi, It's solution to support setting color for <switch> component in android. And the api was according to ios design, a slight difference is <switch> can accept 4 attributes in android:

	android	ios
tint-color	√	√
on-tint-color	√	√
thumb-tint-color	√	√
on-thumb-tint-color	√	×

Weex Vue Demo: http://dotwe.org/vue/e9d87730e016bec01225e546ff10ef0d

[weex-bot]

	Fails
🚫	android platform run unit test failed!

	Messages
📖	android test finished.

Generated by 🚫 dangerJS

[acton393]

@gubaojian @misakuo please take a review

[gubaojian]

switch great support, please attach dotwe.org example link

[whn9527]

demo link please look at http://dotwe.org/vue/e9d87730e016bec01225e546ff10ef0d

[acton393]

hi @whn9527 maybe your commit message should be the format like

[WEEX-jira][iOS/Android] summary 
   
description 


Bug/ImprovementId(jira ID)

not just like *[Android] later

see more development-process

thanks

[whn9527]

Thanks for reminding, I will pay attention next time