Keymint: Add support for CERTIFICATE_NOT_BEFORE/AFTER

Also change CERTIFICATE_SERIAL to BIGNUM.

Test: N/A
Change-Id: Iaa4d4b9d6db894ce4e1a1035774285f177606493
diff --git a/ng/AndroidKeyMintDevice.cpp b/ng/AndroidKeyMintDevice.cpp
index 8850dc6..690abf2 100644
--- a/ng/AndroidKeyMintDevice.cpp
+++ b/ng/AndroidKeyMintDevice.cpp
@@ -97,6 +97,8 @@
         case KM_TAG_AUTH_TOKEN:
         case KM_TAG_CERTIFICATE_SERIAL:
         case KM_TAG_CERTIFICATE_SUBJECT:
+        case KM_TAG_CERTIFICATE_NOT_AFTER:
+        case KM_TAG_CERTIFICATE_NOT_BEFORE:
         case KM_TAG_CONFIRMATION_TOKEN:
         case KM_TAG_DEVICE_UNIQUE_ATTESTATION:
         case KM_TAG_IDENTITY_CREDENTIAL_KEY: