Notifications fix

[RiccardoM]

Description

This PR aims to fix the notifications working for iOS devices

Checklist

• [ ] Targeted PR against correct branch.
• [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• [ ] Wrote unit tests.
• [ ] Run flutter format.
• [ ] Updated the documentation.
• [ ] Added an entry to the CHANGELOG.md file.
• [ ] Re-reviewed Files changed in the Github PR explorer.

[codecov[bot]]

Codecov Report

Merging #96 into master will increase coverage by 0.16%. The diff coverage is 60.00%.

@@            Coverage Diff             @@
##           master      #96      +/-   ##
==========================================
+ Coverage   17.54%   17.70%   +0.16%     
==========================================
  Files         258      258              
  Lines        6252     6257       +5     
==========================================
+ Hits         1097     1108      +11     
+ Misses       5155     5149       -6     

Impacted Files	Coverage Δ
...creens/security_login_biometrics_screen/index.dart	0.00% <0.00%> (ø)
.../screens/security_login_password_screen/index.dart	0.00% <0.00%> (ø)
.../notifications/remote/models/fcm_message_data.dart	57.89% <100.00%> (+57.89%)	:arrow_up:

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