Fix Slow Connectivity Crash

[ferquies]

Add a function to check the internet availability and use it before make any network calls

#38

[Chinmay-KB]

Okay, so there are a few places where we need an active internet connection

FAQ
Book your appointment
Mentors
It would be nice if you could check for internet connection everywhere.
Also, display an appropriate snackbar notifying the user of the inactive internet connection.

I'd recommend you to rather implement the internet connectivity logic on the flutter side than in native, so that implementing the snackbar is easier for you

[ferquies]

Ok, I keep working on it

[DesignrKnight]

Any update?

[ferquies]

Sorry, I'd wrote a comment with doubts in the issue section and I think you didn't saw, I paste it here:
Ok, in Mentors section there are actually a button that indicates there is no internet connection. Did you mean we must show the "No internet connection" snackbar before open any section that needs internet or implement the snackbar inside each section?
And in case we must show the snackbar inside each screen, in the case of FAQ I have to show it in native.

[DesignrKnight]

A uniform snack-bar in all route/activity that shows no connectivity in case of lack of internet access is what we are expecting as an ideal solution.

[ferquies]

I maked another pull request at #51