Fall back to default values in the FreeOTP importer

[alexbakker]

Fixes #1605

[Copilot]

Pull Request Overview

This pull request fixes issue #1605 by adding fallback default values for FreeOTP importer fields when they are missing in the input data.

• Updated FreeOtpImporter to use optString and optInt to default missing "algo", "digits", and "period" values.
• Added a new test (testImportFreeOtpV2NullAlgo) to verify that the importer correctly handles a null algorithm.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
app/src/test/java/com/beemdevelopment/aegis/importers/DatabaseImporterTest.java	Added test case for null "algo" handling in encrypted FreeOTP v2 data
app/src/main/java/com/beemdevelopment/aegis/importers/FreeOtpImporter.java	Changed JSON field extraction to provide default fallback values for missing fields

Comments suppressed due to low confidence (1)

app/src/main/java/com/beemdevelopment/aegis/importers/FreeOtpImporter.java:301

• Consider adding additional test cases to verify that the default fallback values for 'digits' and 'period' fields are correctly applied when those fields are absent in the JSON input.

String algo = obj.optString("algo", OtpInfo.DEFAULT_ALGORITHM);