scrollToElement doesn't work in Android

[Jinjiang]

code example:

<template>
  <scroller>
    <text id="top" style="height: 10000;">Hello, World!</text>
    <text onclick="gotoTop">Goto top</text>
  </scroller>
</template>

<script>
  var dom = require('@weex-module/dom')
  module.exports = {
    methods: {
      gotoTop: function () {
        var top = this.$el('top')
        dom.scrollToElement(top)
      }
    }
  }
</script>

[YorkShen]

The method in Android expected to receive two parameter when invoking scrollToElement()method, if only one parameter is given, nothing will happen.

This issue has fixed. The second will be 0 if only one parameter is given