Copy com_android_nfc certs for sepolicy rule

Copied from:
  com_android_nfc.pk8 -> nfc.pk8
  com_android_nfc.x509.pem -> nfc.x509.pem

BUG: 320583956
Test: Bootup test with signed NFC APK (within NFC apex)
Merged-In: Ia0c1c7228323dec4d283f469701ae3606e2fadca

Change-Id: Ia0c1c7228323dec4d283f469701ae3606e2fadca