Merge "Modify AttestationUtils to use public Keystore API" am: 7a46c3c1fd am: a1d687e0e5 am: 0ce87eacbb

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1622922

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I6e7fab5ec09589a2fc5da0548f5f2a48e7130baf