Merge "Check the signature on the EEK Chain." into sc-dev am: 6e061db49f am: adb22713de am: a713879287

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

Change-Id: I5100ac2d25d733cf6a0d04d2eaa912a018503f70