Fix stale GetServURL mock expectations and add isSecureDbgSrvUnlocked unit tests

[Copilot]

The isSecureDbgSrvUnlocked() PROD path checks three conditions (isDebugServicesEnabled(), getDeviceTypeRFC(), LABSIGNED_ENABLED), but existing GetServURL GTests only mocked the first, leaving the PROD+enabled tests silently broken and missing coverage for the new gating logic.

Fixes to existing tests

• VBN (non-PROD) tests (4): Removed stale isDebugServicesEnabled().Times(1) expectations — non-PROD builds short-circuit to true before reaching that call.
• PROD + debug-enabled tests (2): Added getDeviceTypeRFC and getDevicePropertyData mock expectations (returning "test"/"true"/UTILS_SUCCESS) so isSecureDbgSrvUnlocked(ePROD) actually unlocks and the conf-file URL path is taken.
• PROD + debug-disabled tests (2): Added the same mocks (with permissive values) to prove dbgServices=false alone locks the build, eliminating unregistered-call warnings.

New isSecureDbgSrvUnlocked unit tests

Six focused tests exercising each input independently:

Test	Inputs	Expected
IsSecureDbgSrvUnlocked_NonProdBuild_ReturnsTrue	eVBN	true
IsSecureDbgSrvUnlocked_Prod_AllConditionsMet_ReturnsTrue	dbgServices=true, deviceType="test", labsigned="true"	true
IsSecureDbgSrvUnlocked_Prod_DebugServicesDisabled_ReturnsFalse	dbgServices=false	false
IsSecureDbgSrvUnlocked_Prod_WrongDeviceType_ReturnsFalse	deviceType="prod"	false
IsSecureDbgSrvUnlocked_Prod_LabsignedFalse_ReturnsFalse	labsigned="false"	false
IsSecureDbgSrvUnlocked_Prod_LabsignedPropertyFailed_ReturnsFalse	getDevicePropertyData() returns -1	false

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