Make it possible to pass specific APEXes to test on the command line.

Test: art/build/apex/runtests.sh com.android.art.host
Test: art/build/apex/runtests.sh
Bug: 175898636
Change-Id: I42f47dbf57af663478848a1b80459a0fab308e7d
Merged-In: I42f47dbf57af663478848a1b80459a0fab308e7d
(cherry picked from commit 3c9d9c97ef8f525525523480bd5c757342e62f9c)
1 file changed