Keystore 2.0 SPI: Evolve Factory SPI

We no longer need to get the key characteristics from the Keystore
daemon to construct the KeyInfo for a key. Also we have to extract the
key info from the KeyParameter AIDL type rather than from the hand
written KeymasterArguments.

This patch also exposes the correct security level for a key through
KeyInfo.

Bug: 159476414
Test: None
Change-Id: I86a85e481e19fdadfed38a42aeac4ffe5f8b83fa