Merge commit '88932754' into nyc-mr1-dev-plus-aosp

* commit '88932754':
  Captive portals: login activity probes like NetworkMonitor
  Logging improvements in CaptivePortalLoginActivity
  Captive portal systel log improvements
  Fix flaky IpPrefixTest.
  Removing bogus file added by mistake
  frameworks-test: adding missing @SmallTest
  Netd events: record connect() success/errno
  Add missing dependency.
  Show notification for always-on app VPN