added viewpager in downloaded fragment to show two tabs

[krishnachaitanya0107]

Hey @justdvnsh , please check out the implementation and please do let me know if there are any changes or improvements which can be done , I will be glad to implement them . thanks

https://user-images.githubusercontent.com/76201176/138227713-43a7ed4e-1c5a-4fba-b3bd-9766b2fdae88.mp4