Handle TARGET_FLATTEN_APEX and PRODUCT_COMPRESSED_APEX being "" when
false.

Also combine calls to Soong to dump build variables, and make it
possible to pass --bitness to art_test_apex.py.

Test: art/build/apex/runtests.sh
Test: art/build/apex/runtests.sh --bitness=multilib
Change-Id: I838693e894a4fe1d788cd3bbc8df66382d5fe442
1 file changed