Cuttlefish: use random root key for RKP am: fbb2bd99e0 am: 71b8de6aa3 am: 2e7f6f02e4 am: 78dc5f86fd

Original change: https://android-review.googlesource.com/c/platform/system/keymaster/+/1768977

Change-Id: I7de7b833de5e55c40cb420f73df8239ffa973e2d