Factor keystore_attestation_id into library and also use this in credstore.

This was needed because credstore needs to generate and pass the
generated AttestationApplicationId to the Identity Credential HAL.

Bug: 111446262
Test: atest android.security.identity.cts
Test: VtsHalIdentityCredentialTargetTest
Test: android.hardware.identity-support-lib-test
Change-Id: Id22b85ca083e23c7e1fbd3459910fba37a5db137
diff --git a/keystore/keystore_attestation_id.cpp b/keystore/keystore_attestation_id.cpp
index b48639f..3d9e87e 100644
--- a/keystore/keystore_attestation_id.cpp
+++ b/keystore/keystore_attestation_id.cpp
@@ -13,7 +13,8 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#include "keystore_attestation_id.h"
+
+#include <keystore/keystore_attestation_id.h>
 
 #define LOG_TAG "keystore_att_id"