add ui state in view models for Compose

[qamarelsafadi]

In Gallery Screen, I believe that the screen would have a 3 states

The first one is when the request is already successful and the data is showing,

Second, when the data is loading we might have to show a loader to tell the user that the data is on its way to be shown

The third one is if the request has failed we need to let the user know that there is something wrong with the API or his internet connection.

Part of GTC open source initiative

[arriolac]

Please add more details in the description on why this should be done. I'm not convinced this is a necessary change.

[qamarelsafadi]

Done,

Let me know what do you think.