libcore: Do not pre-bind socket in connect method

The connect method in Java should not have to explicitly
bind to Inet4Address.ANY. For unbound sockets, the kernel's
connect function will perform an inet_autobind.

cherry picked from commit-id f4d980670fd4938a6b5ec07a5818454fc44f2a57

CRs-fixed: 370996
(cherry picked from commit c52ae135bb14a96d237e971fb01bfae30723be2a)

Change-Id: I276aa01161e53b90beb8fed2eadb2d48922688d6