Gitignore / Pubignore inconsistencies: some files exists on gitignore but are commited into the repository

[danielgomezrico]

After running flutter pub publish it prints this warning:

* 7 checked-in files are ignored by a `.gitignore`.
  Previous versions of Pub would include those in the published package.

  Consider adjusting your `.gitignore` files to not ignore those files, and if you do not wish to
  publish these files use `.pubignore`. See also dart.dev/go/pubignore

  Files that are checked in while gitignored:

  android/gradle/wrapper/gradle-wrapper.jar
  android/gradlew
  android/gradlew.bat
  example/android/app/src/debug/AndroidManifest.xml
  example/ios/Podfile.lock
  example/pubspec.lock
  pubspec.lock