Merge "Implement GenerateUniqueId for PureSoftKeymasterContext" am: df2b4db4f0 am: 564c63ebf6 am: 17303dd5c5

Original change: https://android-review.googlesource.com/c/platform/system/keymaster/+/1940395

Change-Id: I9afa8a153d1fe11c83ddd069080a6e09e1ce3410