Inclusive language fixes in `art_apex_test.py` script.

Update language to comply with Android’s inclusive language guidance.
See https://source.android.com/setup/contribute/respectful-code for
reference.

#inclusivefixit

Test: art/build/apex/art_apex_test.py
Bug: 161336379
Bug: 161896447
Change-Id: I29433a88c9f80235a705b497069e265fdae31d97
1 file changed