Update proguard-rules.pro to include concurrent annotations

[LuisDuarte1]

For some reason javax.annotation.concurrent is not covered by javax.annotation.*

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 17%. Comparing base (5775214) to head (5b6a022).

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #1250   +/-   ##
=======================================
  Coverage       17%     17%           
=======================================
  Files          229     229           
  Lines         6965    6965           
=======================================
  Hits          1149    1149           
  Misses        5816    5816           

[thePeras]

Still not working, the flutter build command

* What went wrong:
Execution failed for task ':app:packageRelease'.
> A failure occurred while executing com.android.build.gradle.tasks.PackageAndroidArtifact$IncrementalSplitterRunnable
   > SigningConfig "release" is missing required property "storeFile".

[limwa]

Still not working, the flutter build command

* What went wrong:
Execution failed for task ':app:packageRelease'.
> A failure occurred while executing com.android.build.gradle.tasks.PackageAndroidArtifact$IncrementalSplitterRunnable
   > SigningConfig "release" is missing required property "storeFile".

Do you have the keystore on your PC?

[LuisDuarte1]

Still not working, the flutter build command

* What went wrong:
Execution failed for task ':app:packageRelease'.
> A failure occurred while executing com.android.build.gradle.tasks.PackageAndroidArtifact$IncrementalSplitterRunnable
   > SigningConfig "release" is missing required property "storeFile".

you might have to make a keystore or I think you can temporarily remove the signing config override in build.gradle.

Not applicable to the PR

[DGoiana]

Able to build it successfully 👍