Add another Adapter example for custom Headers.

[JahanzaibShahid87]

Here I decide If we have Json like this
{
"item": [{
"id": "1",
"name": "item1"
}, {
"id": "2",
"name": "item2"
}, {
"id": "3",
"name": "item3"
}],
"Sample": [{
"id": "1",
"name": "Sample1"
}, {
"id": "2",
"name": "Sample2"
}, {
"id": "3",
"name": "Sample3"
}]
}

So user should be able to simple pass two paramaters headers list and array of data_array then adapter will handle these parameters and show result like this