Keystore 2.0 SPI: Evolve the Crypto SPI.

This patch evolves the Crypto SPI to use the new Keystore 2.0 shim.
The main changes are:
 * The SPI uses the AIDL defined KeyParameter instead of
   KeymasterArguments.
 * Operations are created directly from the KeystoreSecurityLevel that
   is part of the AndroidKeyStoreKey object.

Also this patch deletes the DeletatingX509Certificate class. This is no
longer needed, because public key operations are no longer performed by
Keystore 2.0. We can delegate public certificate operations simply by
wrapping such certificates into public keys that are understood by other
providers, such as BouncyCastle.

Bug: 159476414
Test: None
Change-Id: Ice874a8121d80bf788da059b4e8420c7dd799d81