tree b33edc2001df82cd50cc71950bff78ccaf924593
parent a3c10cd22bbf718dde08aac357a3fb164352f443
author lucaslin <lucaslin@google.com> 1553077319 +0800
committer lucaslin <lucaslin@google.com> 1553077319 +0800

Improve partial connectivity

Improve the design and fix some nits.

Bug: 113450764
Test: 1. Build pass
      2. atest FrameworksNetTests
      3. atest NetworkStackTests
      4. Change captive_portal_https_url to https://invalid.com
      to simulate partial connectivity.
Change-Id: Ia56645841d00d2ed8406cfeacb86a4a27fd58650