This fixes a bug in credstore where it only worked if a credential
used ACP ids starting at zero and upwards (e.g. no holes). This is not
a reasonable requirement, it just happened to be a bug which wasn't
triggered because all CTS tests uses identifiers starting at 0 with
no holes.
This bug-fix is merged along with a new CTS test to check this bug no
longer exists.
Bug: 160966911
Test: atest android.security.identity.cts
Test: New CTS test testProvisionAcpIdNotStartingAtZero
Change-Id: I58595e6bf5f3ca3f82ebe9291fde54b7cf11e0dd
5263000348