fix(auth): Fix parsing of REQUIRES_UPPERCASE/REQUIRES_LOWERCASE password settings in Gen1

[mattcreaser]

• [x] PR title and description conform to Pull Request guidelines.

Issue #, if available:

2835

https://github.com/aws-amplify/amplify-ui-android/issues/154

Description of changes: The correct values for the Gen1 configuration password settings are REQUIRES_UPPERCASE/REQUIRES_LOWERCASE.

How did you test these changes?

• Verified that all settings were respected with a config generated from the CLI.

Documentation update required?

• [x] No
• [ ] Yes (Please include a PR link for the documentation update)

General Checklist

• [x] Added Unit Tests
• [ ] Added Integration Tests
• [ ] Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.