Changed RP logs to only error when RKP only

This error occurs when there are no attestation keys to give
and is not a true error. In meeting it was decided that the
RKP keys being empty is fine and the only time to warn when
we are on an RKP only device.

Test: Run and tested using `atest keystore2_test` for Rust test and CTS test with `atest CtsKeystoreTestCases`
Bug: 241924261
Change-Id: I234493522ac59babad1a5dd315d7070eab9da3b9
1 file changed