Add logging to client for CACgi error 16; logging only occurs when error is encountered, b/6614495.
This version also includes the fix for spurious "data stopped arriving" messages, b/6512768.
Change-Id: I49e56dc1ab59abfb3037834a04748b0d5247aa50
related-to-bug: 6614495
related-to-bug: 6512768