Update tools/ modules for compatibility with python 3.

Fixes #4097.
Fixes part of #4310.

Closes #4265.

PiperOrigin-RevId: 179437184
diff --git a/tools/android/resource_extractor.py b/tools/android/resource_extractor.py
index 2cd11d9..7c21f71 100644
--- a/tools/android/resource_extractor.py
+++ b/tools/android/resource_extractor.py
@@ -22,6 +22,8 @@
   python resource_extractor.py <input jar> <output zip>
 """
 
+from __future__ import print_function
+
 import sys
 import zipfile
 
@@ -95,7 +97,7 @@
 
 def main(argv):
   if len(argv) != 3:
-    print USAGE
+    print(USAGE)
     sys.exit(1)
   with zipfile.ZipFile(argv[1], 'r') as input_jar:
     with zipfile.ZipFile(argv[2], 'w') as output_zip: