Fix build of Android example app on Mac ARM

[Widcket]

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

📋 Changes

This PR fixes a couple of errors preventing the build of the Android example app on Mac M2 processors.

[Widcket]

This was duplicated; see L32 below if (project.android.hasProperty("namespace")).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (253209a) 96.08% compared to head (dc85834) 95.80%.
Report is 17 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #333      +/-   ##
============================================
- Coverage     96.08%   95.80%   -0.29%     
============================================
  Files            97       76      -21     
  Lines          1611     1121     -490     
  Branches        331      281      -50     
============================================
- Hits           1548     1074     -474     
+ Misses           49       46       -3     
+ Partials         14        1      -13     

Flag	Coverage Δ
auth0_flutter	100.00% <100.00%> (ø)
auth0_flutter_android	?
auth0_flutter_ios	?
auth0_flutter_platform_interface	87.03% <100.00%> (ø)

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Files	Coverage Δ
...lib/src/web/extensions/user_profile_extension.dart	100.00% <100.00%> (ø)
...lutter_platform_interface/lib/src/credentials.dart	100.00% <100.00%> (ø)

... and 23 files with indirect coverage changes

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