Merge "identity: Clarify validity period for auth keys." am: 3522198eb4 am: 8be35e964b am: 877eb23e5d

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2475025

Change-Id: I1ccb0d0ed867bc41c75d2f3d38a09a08f23aaa80
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>