Add SE hal support for SNXXX
Move existing se hal to pn8x/
Add se hal for snxxx in snxxx/
Move existing extns/intf to intf/
Update Android.bp files to build hals for pn8x and snxxx
Bug: 188034640
Test: CTS, VTS, NFC On/OFf,
Data exchange to SE using OMAPI APIs
Change-Id: I8df25d1b743f7bd012ccb021d92880f774581eef