svc nfc should support watches too

Check for both FEATURE_NFC and FEATURE_NFC_HOST_CARD_EMULATION in the
"svc nfc" command.  Watches may only have the latter, but should still
support the nfc enable/disable command.

See b/24532713#comment7 for context.

Bug 32386425

Change-Id: I307798f00728c6b437aebfcf58115af7265e3692