Add default id to default keymint IRPC

Each implementation of an IRemotelyProvisionedComponent must have a
unique id. Include the id in the default keymint implementation.

Bug: 194696876
Test: VtsHalRemotelyProvisionedComponentTargetTest
Change-Id: Id02e0895f8ac417d316a14ada446c8c47c680539
diff --git a/ng/AndroidRemotelyProvisionedComponentDevice.cpp b/ng/AndroidRemotelyProvisionedComponentDevice.cpp
index ccd13d5..fea7213 100644
--- a/ng/AndroidRemotelyProvisionedComponentDevice.cpp
+++ b/ng/AndroidRemotelyProvisionedComponentDevice.cpp
@@ -86,6 +86,7 @@
     info->versionNumber = 1;
     info->rpcAuthorName = "Google";
     info->supportedEekCurve = RpcHardwareInfo::CURVE_25519;
+    info->uniqueId = "default keymint";
     return ScopedAStatus::ok();
 }