fix: ReZygiskd Magisk DenyList not checking against process

This commit improves the precision of ReZygiskd check for Magisk if a process is in DenyList/SuList, as previously it used "package_name" instead of the correct "process" field.

loader/src/include/socket_utils.h

@@ -4,6 +4,8 @@
 #include <stdint.h>
 
 int read_fd(int fd);
+
+ssize_t write_string(int fd, const char *str);
   
 char *read_string(int fd);