[issue26855] android: add platform.android_ver()

[Xavier de Gaye]

Xavier de Gaye added the comment:

The ro.kernel.qemu property is set to 1 on an Android emulator and 0 otherwise. I think it should be added to the list.  On some threading tests where the switch interval is set to one microsecond, it is necessary to set the switch interval to a higher value when running on the qemu emulator, see the three issues:
    issue #26939: android: test_functools hangs on armv7
    issue #26940: android: test_importlib hangs on armv7
    issue #26941: android: test_threading hangs on armv7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26855>
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