Keystore 2.0: Handle Keystore enforceable enforcement parameters.

KeyMint adds some new enforceable features. We don't want to confuse the
legacy backends, so we already filter them from the input parameters.
As a result they won't be included in the output key characteristics, so
in this patch we identify them and add them back in.

Test: N/A
Change-Id: I1bc496eca7d79aa1bb6dc2cfa7f0b3821969b401
1 file changed