Limit the number of returned access technology settings

[kstribrnAmzn]

Description

Respect the maximum list size of eRDX configurations.

In the case of a cellular modem returning more eRDX settings through the AT+CEDRXS? query, the current library would write out of bounds. This would only happen in two cases:

• misconfiguration - you should match the max eRDX settings to the chip through the CELLULAR_EDRX_LIST_MAX_SIZE macros
• MITM attack - where the attacker intercepts the hardwired communication and returns a deliberately oversized response.

Test Steps

Unit test added

Checklist:

• I have tested my changes. No regression in existing tests.
• I have modified and/or added unit-tests to cover the code changes in this Pull Request.

Related Issue

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