Add remote key provisioning to the IC HAL

The IIdentityCredentialStore can now advertise the correct
IRemotelyProvisionedComponent that is used for getting remotely
provisioned attestation keys.

IWritableIdentityCredential has a new method so it can accept remotely
provisioned keys.

Update the VTS tests to check the new RKP functionality.

Support RKP in the default identity cred service

Test: VtsHalIdentityTargetTest
Bug: 194696876
Change-Id: I96dcf3027e0f21790c35900ddf8cc0953bd3b1ca