Make Network.openConnection() share HttpHandlers not OkHttpClients.

HttpHandler and HttpsHandler classes have a lot of bug fixes baked into
them that the Network.openConnection() API should be using, for example
disabling SPDY support.

bug:17420465
Change-Id: I9f1472753a542d1dd6bffde3a60c37a9145098aa
1 file changed
tree: 06ca97fc06c7c46b3096d3913c88c18280b705e6
  1. core/
  2. services/
  3. tests/