Android: binder: added a missing blank line after declaration

Fixed a coding style issue.
Signed-off-by: Andrew Bridges <andrew@slova.app>
Link: https://lore.kernel.org/r/20201027225655.650922-1-andrew@slova.appSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/android/binder.c

@@ -3614,6 +3614,7 @@ static int binder_thread_write(struct binder_proc *proc,
 			ret = -1;
 			if (increment && !target) {
 				struct binder_node *ctx_mgr_node;
+
 				mutex_lock(&context->context_mgr_node_lock);
 				ctx_mgr_node = context->binder_context_mgr_node;
 				if (ctx_mgr_node) {