[Android] Fixed make_apk.py does not work on windows

The issue I'm trying to solve is XWALK-2337.
There are 2 reasons cause this bug.
1 The subprocess.Popen and subprocess.call should pass "shell=True".
2 The second reason is that the args of subprocess.call required a sequence of arguments instead of contain "=" on Windows.

BUG=https://crosswalk-project.org/jira/browse/XWALK-2377