entd: move opencryptoki initialization out of entd
Look for a file /home/chronos/.cryptohome-init-pkcs11 and expect cryptohome to initialize the PKCS#11 token, disabling that interface in newer extensions.
old extension / new entd (w/ and w/o flag)
new extension / old entd:
new extension / new entd (w/ and w/o flag):
When flag is set with new entd, Initialize button disappears and we wait for cryptohomed to signal the TPM token is ready.