Support reading ATAP certificate UUID from keymaster

Add API and IPC calls to read the ATAP certificate UUID from keymaster.
Also rename const local variables to the standard convention.

Test: 1. Verify "fastboot getvar at-attest-uuid" is empty before provisioning
      2. Provision Android Things attestation credentials
      3. Verify "fastboot getvar at-attest-uuid" is correct
Bug: 76211194
Change-Id: I25067bc35ee3eee41bac3d170afab6a0d01d11c4
3 files changed
tree: 055cbfc0f4b598094c51348a565e6effaba765e3
  1. interface/
  2. ql-tipc/