appium/appium — pull request #1969 by paymand (2014-02-27 12:11:29+00:00)
Title: Fixed page_source() for newer Android versions.

Fix for https://github.com/appium/appium/issues/675.

On my Nexus 5 (4.4.2), the hierarchy file name is different from what page_source() excpects.
With this fix will try to look for a list of possible dump files before giving up and returning an empty string.