Merge "ID attestation: update docs for a second IMEI" am: 2f2544e410 am: 1fe35dfb9a

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2309483

Change-Id: If284066922dcba30c4c673f4616cb09b4ced2492
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>