Avoid using XPath in recoverablekeystore.certificate.CertUtils

Change-Id: I6b1a0b460334d69766daa13eed98a5a067bbedca
Fix: 74730734
Test: atest
FrameworksServicesTests:com.android.server.locksettings.recoverablekeystore
atest -m RecoveryControllerHostTest RecoverableKeyStoreEndtoEndHostTest
RecoverySessionHostTest
1 file changed