Merge "Check the signature on the EEK Chain." into sc-dev am: 6e061db49f am: adb22713de

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/keymaster/+/14961176

Change-Id: I3b984fd909f5f3c6603a8e9ff5337afbdfbbdcac