Merge changes I55978198,I2cde146f,I3e1af10d,Ibfbacc76

* changes:
  netd: Save partial fwmark in connmark
  netd: add CONNMARK_FWMARK_MASK to be used in iptables rule
  netd: convert ConnmarkFlags to enum class
  netd: Add mangle OUTPUT chain and connmark specific child chains
tree: 437fdea5f1f641149c9697598bcfc982793d090a
  1. client/
  2. include/
  3. netutils_wrappers/
  4. server/
  5. tests/
  6. .editorconfig
  7. Android.bp
  8. NOTICE
  9. OWNERS
  10. PREUPLOAD.cfg
  11. TEST_MAPPING