Fix ID attestation.

The previous change to add support for attestation for system keys
broke attestation for non-system keys, causing keystore to segfault
and the CTS tests to fail.

Test: runtest --path cts/tests/tests/keystore/src/android/keystore/cts/KeyAttestationTest.java
Change-Id: I08d649755e78bb044157b44b30f1d13183447634
1 file changed