Implement updating CRMP retry intervals on the Thread poll period value and device type change

[kkasperczyk-no]

Problem

In the #5841 the TXT record describing CRMP retry intervals was added. However for Thread devices those intervals depend on the device type (SED/MED) and sleepy end device poll period, which both may change dynamically during the lifetime of the device. Current solution doesn't address this problem.

Proposed Solution

Implement handling notifications on Thread device type change and poll period value change and updating operational discovery information. If notifications can't be handled because of the OpenThread API, implement updating information when calling SetThreadDeviceType() and SetThreadPollingConfig() methods.

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[stale]

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