Set TCP_KEEPALIVE idle and interval on Android.

net/socket/tcp_client_socket_libevent.cc

Index: net/socket/tcp_client_socket_libevent.cc
diff --git a/net/socket/tcp_client_socket_libevent.cc b/net/socket/tcp_client_socket_libevent.cc
index bd31cbebfcd16f1ec09b32d5447ddd95e3eed83c..85b9fb4648291777ff54d10c6d6e566d552339aa 100644
--- a/net/socket/tcp_client_socket_libevent.cc
+++ b/net/socket/tcp_client_socket_libevent.cc
@@ -52,7 +52,7 @@ bool  SetTCPKeepAlive(int fd, bool enable, int delay) {
     PLOG(ERROR) << "Failed to set SO_KEEPALIVE on fd: " << fd;
     return false;
   }
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_ANDROID)
   // Set seconds until first TCP keep alive.
   if (setsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &delay, sizeof(delay))) {
     PLOG(ERROR) << "Failed to set TCP_KEEPIDLE on fd: " << fd;