Reimport NSS 3.97

Reimport NSS 3.97, using the new certimport tool. The content is
semantically identical. Some part of the human-readable certificate are
different (identation level or formatting for signature algorithm name).

Bug: 328313691
Test: atest CtsSecurityTestCases:android.security.cts.CertificateTest
Change-Id: I0ab6a50e5e0921da1770d51a7cf730dbbf2c94a7