Provide VINTF for Trusty Keymaster

This makes it easier to add or remove the Trusty keymaster service from
a device by providing a manifest fragment to add whenever it is enabled.

Test: Keymaster VTS, Keystore CTS (sans attestation)
Change-Id: Ib0f5fd7c016c0c18d77c9d2623c89f3b35ba7ad7
2 files changed