Revert "Fix encoding of PubKeyEd25519"

Revert submission 2101265-b/233338216

Reason for revert: Breaks tests: b/233588299
Reverted Changes:
I6f7a61ee3:Fix encoding of PubKeyEd25519
I544d9086f:Verify that the VM-generated BCC is valid

Change-Id: Ifb93514c1bef186d82f7b8ce3eb175655514b79b
2 files changed