RDKB-59581: Region Check Feature for XER10 UK

[sowmiyachelliah]

Reason for change: This commit mainly includes add a support for the region check based on Xconf response and set the country code for wifi interfaces.

Here this change mainly includes:

1. By default, country code should be IE (Ireland).
2. Based on RFC response, adjust the country code based on region information received from Xconf.
3. Persist the information.
4. Clear upon FR.

Test Procedure:

1. Check default country code - it should be IE
2. Check its changes to GB for UK region device after 2-3 minutes
3. Reboot and make sure it is GB.
4. FR, and check the steps (1) and (2)

Priority:P1

Change-Id: I8e9bf4c4f9afac603ade82538e0125b6d2c3f80c Risks:Low

(cherry picked from commit 0a796036eea864b2d887b202e044ece50805fc0b) (cherry picked from commit 95e1379e370911f21573238e63e2d2b4883ea08f)

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❌ sowmiyachelliah
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