Dialog while request background location

[subashz]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
Show the popup before requesting for background location service all the time. It's better to have alert dialog with new string fields for the message.

Describe alternatives you've considered
Changed the location request message to reflect the changes.

Additional context
You can find the full screenshots at: https://imgur.com/a/L7fClCO