Rename various functions for consistency and clarity.

The .so and .jar suffixes are dropped from all library check calls to make
those lines sort in the same order as e.g. in the Android.bp file (the
sorting itself will go into a follow-up CL).

Test: art/build/apex/runtests.sh
Bug: 124293228
Change-Id: I0ac824524f73e43a8e86edb199215c440178ce71