Add AIDL interface for device registration service., Fixes AB#3127905

[p3dr0rv]

This pull request introduces a new IPC client for device registration and refines access control for service client methods. The most significant changes are the addition of the DeviceRegistrationServiceClient, the definition of its AIDL interface, and the adjustment of method visibility in service client classes for better encapsulation.

Device Registration IPC Integration

• Added a new AIDL interface IDeviceRegistrationService.aidl to define the contract for device registration operations between the broker and client.
• Introduced DeviceRegistrationServiceClient.kt, a Kotlin class that binds to the device registration service and executes device registration protocol operations via IPC.

Service Client API Refinement

• Changed the visibility of performOperationInternal and getInterfaceFromIBinder methods in BoundServiceClient.java and MicrosoftAuthClient.java from abstract/public to protected abstract/protected, restricting their accessibility to subclasses only. [1] [2] [3]

AB#3127905
Related PR: https://github.com/identity-authnz-teams/ad-accounts-for-android/pull/81

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[Copilot]

Pull request overview

Introduces a new bound-service IPC surface for device registration and refines the bound-service client extension API to be less externally accessible.

Changes:

• Added IDeviceRegistrationService.aidl defining a bound-service contract for device registration protocol execution.
• Added DeviceRegistrationServiceClient to bind to the broker’s device registration service and delegate the protocol call via AIDL.
• Tightened BoundServiceClient/MicrosoftAuthClient extension point visibility (performOperationInternal, getInterfaceFromIBinder) to protected.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
common/src/main/java/com/microsoft/identity/common/internal/broker/ipc/DeviceRegistrationServiceClient.kt	New bound-service client for device registration IPC delegation.
common/src/main/java/com/microsoft/identity/common/internal/broker/MicrosoftAuthClient.java	Restricts internal bound-service extension methods to protected.
common/src/main/java/com/microsoft/identity/common/internal/broker/BoundServiceClient.java	Makes subclass extension points protected abstract for encapsulation.
common/src/main/aidl/com/microsoft/identity/client/IDeviceRegistrationService.aidl	New AIDL contract for device registration protocol invocation.

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✅ Work item link check complete. Description contains link AB#3127905 to an Azure Boards work item.

[rpdome]

should this be in the broker repo?

[p3dr0rv]

We are planning to expose the DR API to OneAuth so we need this interface here, if I move it to broker it will be back in common.

[mohitc1]