The Talawa Mobile App Should Periodically Query the API for New Translation JSON Files

[palisadoes]

Is your feature request related to a problem? Please describe.

1. The mobile app currently has a set of pre-defined JSON files used for translating menu items
2. The API will store:
   1. Updated versions of existing files
   2. New files for previously unsupported languages

Describe the solution you'd like

1. The mobile app must periodically query the API server for the latest JSON files. Possibly when the app is started.
2. Newly discovered language files must be added to the language selection menu for the mobile app.

Describe alternatives you've considered

None

Approach to be followed (optional)

See above

Additional context

1. Refer to the comments in this pull request for context Model and Schema update for appLanguage talawa-api#281

[sumitra19jha]

@palisadoes Please assign this to me