Check ADR bit in LinkADRAns

[halimi]

Summary

References: #7376

According to the LoRaWAN spec 1.0.3 and 1.0.4 the Network Server should check the ADR bit in the LinkADRAns and based on that decide if the End device rejected the request or not.

Changes

• Changed the logic in HandleLinkADRAns to use the ADR bit too (if the MAC version is 1.0.3 or 1.0.4) when it checks the ChannelMaskAck, DataRateIndexAck and TxPowerIndexAck bits

Testing

Steps

• Use an end device that doesn't support ADR
• Send LinkADRReq command from network server
• The device should reply with LinkADRAns and the ChannelMaskAck bit should be on and the ADR bit should be off in the uplink FCtrl
• The network server should mark the answer as accepted and shouldn't send LinkADRReq again

Results

Regressions

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Notes for Reviewers

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Checklist

• Scope: The referenced issue is addressed, there are no unrelated changes.
• Compatibility: The changes are backwards compatible with existing API, storage, configuration and CLI, according to the compatibility commitments in README.md for the chosen target branch.
• Documentation: Relevant documentation is added or updated.
• Testing: The steps/process to test this feature are clearly explained including testing for regressions.
• Infrastructure: If infrastructural changes (e.g., new RPC, configuration) are needed, a separate issue is created in the infrastructural repositories.
• Changelog: Significant features, behavior changes, deprecations and fixes are added to CHANGELOG.md.
• Commits: Commit messages follow guidelines in CONTRIBUTING.md, there are no fixup commits left.