Merge "Implement GenerateUniqueId for PureSoftKeymasterContext" am: df2b4db4f0 am: 564c63ebf6 am: 17303dd5c5 am: 9bd9d913f5

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

Change-Id: Ibbfa301a92f820244cc61542e1b092f0d6f5b841