Merge "Avoid SIGSEGV if attest key generation fails." am: 14604af9d1 am: b07682e3db am: 7f3d007475

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1915277

Change-Id: If0291eba3edee3982b68288c459568a587c59938