This port will be removed on 2020-12-31 if not fixed
USES=python:2.7,build can be replaced with USES=python:build at the cost of more tests failing.
Alternatively, TEST_PYTHON can be removed. The value it provides is a bit questionable.
A commit references this bug:
Date: Wed Dec 23 21:28:31 UTC 2020
New revision: 559030
devel/android-tools-adb: drop lang/python27 dependency
-Ran 51 tests in 5.527s
+Ran 62 tests in 17.952s