Add debug and remove SocketTimeoutException.

Bad merge from jb-mr2 to klp, the SocketTimeoutException
in isCaptivePortal should not be present. Also add debug
for bug 9972012. The SocketTimeoutException is a possible
cause of 9972012 but the logs from post #24 it was not
caused by a timeout, so this is not a fix.

Bug: 9972012
Change-Id: I290518832f8258d4682821815834f5621245b643