test/py: avb: Move AVB test to android dir

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>

diff --git a/test/py/tests/test_avb.py b/test/py/tests/test_android/test_avb.py
similarity index 100%
rename from test/py/tests/test_avb.py
rename to test/py/tests/test_android/test_avb.py