Merge tag 'android-9.0.0_r16' into lineage-16.0

Android 9.0.0 Release 16 (PQ1A.181105.017.A1)

* tag 'android-9.0.0_r16':
  Avoid infinite loop in NetlinkListener.
  Set optlen for UDP-encap check in XfrmController
  Don't continuously reevaluate DNS-over-TLS unless strict mode
  netd: Active FTP Helper

Change-Id: Ifd28e2e2778bd54d1cb5b012f2cc1a6e8dbbcd66