cordova media plugin not work on android!

### Problem description

I tried to play media on android using the cordova media plugin,

But it doesn't work (ios works). I have tried many times, but I can't solve it. Is there anyone who can help me?

### Expected behavior

With the official [example](https://github.com/eclipsesource/tabris-js/blob/v2.7.0/examples/cordova/MediaPage.js), extract part of the code, ios work, android has not been successful

### Environment

- Tabris.js version: 2.7
- Device: sharp
- OS: android 8.0

### Code snippet
```
const { Page,Button,app,ImageView,ui,WebView,contentView,Composite,ScrollView,Canvas,device,Popover,TextView,StatusBar} = require('tabris');

document.addEventListener("deviceready", onDeviceReady, true);
function onDeviceReady() {
console.log(Media);

}
var path1 = tabris.app.getResourceLocation("src/assets/media/media.wav");
var path2 =tabris.app.getResourceLocation("android_asset/www/media/media.wav");

function playAudio(url) {

var my_media = new Media(url,
// success callback
function () {
console.log("playAudio():Audio Success");
},
// error callback
function (err) {
console.log(JSON.stringify(err))
console.log("playAudio():Audio Error: " + err);
}
);
// Play audio

my_media.play();
my_media.setVolume('1.0');
}

new Button({
left: 10, top: 10,
text: 'Button'
}).on('select', ()=>playAudio(path1))
.appendTo(ui.contentView);

new Button({
left: 10, top: 10,
text: 'Button'
}).on('select', ()=>playAudio(path2))
.appendTo(ui.contentView);
```