Add test ensuring that BCC keys not unique ids

Get two test BCCs, then ensure that no repeated keys are found.

Ignore-AOSP-First: No merge path to AOSP, will manually port.
Bug: 192687735
Test: VtsHalRemotelyProvisionedComponentTargetTest
Change-Id: I48f86e7dfa9ab4bc6303a8d1b64ac7ca6ac76bbf