Fix imports

BUG=
TEST=

Review URL: http://codereview.chromium.org/8629001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111014 0039d316-1c4b-4281-b951-d872f2087c98

build/android/run_tests.py

@@ -52,6 +52,7 @@ import os
 import re
 import subprocess
 import sys
+import time
 
 import android_commands
 import cmd_helper