Pytest assertion rewriting doesn't work in Android testbed

[mhsmith]

For example, if a test contains the following code:

    a = 1
    b = 2
    assert a == b

macOS outputs this:

    assert a == b
AssertionError: assert 1 == 2

But Android doesn't show the values:

I/python.stdout:     assert a == b
I/python.stdout: AssertionError

This is probably caused by some conflict between the Chaquopy importer and the Pytest assertion rewriting mechanism, which as I understand it, involves actually generating its own .pyc files with the modified bytecode.

In practice, it's usually easy to work around this with some extra logging or an explicit assert message, so it's not worth looking into just now.