Support option to show file sizes in Runtime APEX test scripts' list output.

Support option `--size` in `build/apex/art_apex_test.py` for list
output (`--list`).

Adjust `build/apex/runtests.sh` to honor option `-s`/`--print-sizes`
when using `--list-files`.

Test: art/build/apex/runtests.sh --list-files --print-sizes
Change-Id: Icbe102f1ff1469f1d988c46ac1839ff62478c6f2
2 files changed