AndroidTarget: move _execute_util to internal methods.
diff --git a/devlib/target.py b/devlib/target.py
index 9d7f282..a7deca2 100644
--- a/devlib/target.py
+++ b/devlib/target.py
@@ -283,10 +283,6 @@
 
     # execution
 
-    def _execute_util(self, command, timeout=None, check_exit_code=True, as_root=False):
-        command = '{} {}'.format(self.shutils, command)
-        return self.conn.execute(command, timeout, check_exit_code, as_root)
-
     def execute(self, command, timeout=None, check_exit_code=True, as_root=False):
         return self.conn.execute(command, timeout, check_exit_code, as_root)
 
@@ -558,6 +554,10 @@
 
     # internal methods
 
+    def _execute_util(self, command, timeout=None, check_exit_code=True, as_root=False):
+        command = '{} {}'.format(self.shutils, command)
+        return self.conn.execute(command, timeout, check_exit_code, as_root)
+
     def _extract_archive(self, path, cmd, dest=None):
         cmd = '{} ' + cmd  # busybox
         if dest: