Ignore resources.arsc in apkdiff.py

Due to a bug described in:

https://issuetracker.google.com/issues/110237303

Ordering of resources can be non-deterministic.

A comment on the issue indicates that this may be resolved in
Android Gradle Plugin 3.4. We should revisit when we update.

apkdiff/apkdiff.py

@@ -4,8 +4,9 @@ import sys
 from zipfile import ZipFile
 
 class ApkDiff:
-
-    IGNORE_FILES = ["META-INF/MANIFEST.MF", "META-INF/SIGNAL_S.RSA", "META-INF/SIGNAL_S.SF"]
+    # resources.arsc is ignored due to https://issuetracker.google.com/issues/110237303
+    # May be fixed in Android Gradle Plugin 3.4
+    IGNORE_FILES = ["META-INF/MANIFEST.MF", "META-INF/SIGNAL_S.RSA", "META-INF/SIGNAL_S.SF", "resources.arsc"]
 
     def compare(self, sourceApk, destinationApk):
         sourceZip      = ZipFile(sourceApk, 'r')