Don't extract APEXes directly.

Use deapexer instead, to avoid knowing about .apex file format
internals.

Test: m art-check-{release,debug,testing}-apex-gen
Test: art/build/apex/runtests.sh
Bug: 188809029
Change-Id: I8414acfe23feaafb5bacc748e362d9677db7cc1a
3 files changed