Enatega Customer App: Time mentioned on delivery screen should change in real time

Describe the bug
Time mentioned on delivery screen should change in real time as time past for the food delivery it isn't change until user go back to main page or reopen the app
To Reproduce
Steps to reproduce the behavior:

Go to Enatega Customer Application
Place an order, select a delivery time from restaurant
Now see the time on customer app the time isn't changing it keep showing the same minutes left.

Expected behavior
The time left for delivery should decrease continuously as time progresses.

Start in the Enatega Customer Application and reproduce the issue by placing an order with a selected delivery time, then watching the delivery screen without leaving or reopening the app. Trace the displayed remaining-time value and its refresh behavior; done means the minutes left decrease continuously as time passes.

Written by the indexing model from the issue text.