某些安卓机型下 previewImage 预览出现黑屏
#### 复现路径
以下代码示例，在华为、vivo 等机型调用即可复现
```
wx.previewImage({
current: "https://image.dqccc.com/c_photo/2019/03/12/1145061645219.jpg",
//数据源
urls: [
"https://image.dqccc.com/c_photo/2019/03/12/1145061645219.jpg",
"https://image.dqccc.com/c_photo/2019/03/12/1143521794116.jpg",
"https://image.dqccc.com/c_photo/2019/03/09/1219124252866.jpg"
]
});
```
