Rename trustedUserPresenceRequired.

The existing name is misleading, because it can be read as requiring
that a trusted user be present, rather than the intended meaning of
requiring trusted proof of user presence.  Since this is all about
TEE/SE-based keys, the "trusted" part is implied, so the simple
"userPresenceRequired" name makes more sense.

Bug: 77151288
Test: Keystore CTS tests
Change-Id: If8b533b9f34a1875eaf35cdd1bb8f3709da9761b