Bug Report: Stacking of Select Language Screen

[saksham-gt]

Describe the bug
As I open talawa mobile app, it shows a 'Select Language' screen, where user selects the language. As you click on Select button after selecting the language, it shows a 'Login' page. Now, there's an option to 'Change Language' on this page as well, at the bottom center. And, if we click on 'Change Language' button it replaces current Login Screen with Select Language screen. Therefore in the tree, there are two consecutive Select Language screens. And, it can pile up to 'n' consecutive Select Language screen (shown in the attached video).

To Reproduce
Steps to reproduce the behavior:

1. Open Talawa app
2. Select a language, and click 'Select'
3. On the login page, click on Change Language button (therefore, Select Language screen should appear)
4. Now, press the back button on your device. (Again Select Language screen will show up).
5. Without pressing back, go on clicking 'Select' after Change Language button is pressed. (Select Language Screen will pile up in a stack as shown)

Can you assign me this issue?

Expected behavior
Select Language page should appear only once.

Actual behavior
Multiple Select Language page stack upon each other.

Video

bug_talawa.mp4

[saksham-gt]

I'd also like to resolve this issue. Can you please assign this to me?