Cleanup COMPATIBILITY.automotive-tests.HOST_SHARED_LIBRARY.FILES

COMPATIBILITY.*HOST_SHARED_LIBRARY.FILES is computed for a handful of
suites
https://source.corp.google.com/h/googleplex-android/platform/build/+/4cfebe847e60c9983365897a27a5ab7c321208d4:core/main.mk;l=675;drc=46bd04e115d34fd62b3167128854dfed95290eb0;bpv=0;bpt=0,
and automotive is not of them. In preparation for moving the
installation rules of these shared libraries to Soong, delete this
unused code.

Test: m nothing
Bug: 388850000
Change-Id: I10376a76058e1118e8bab2ea5585a391cf790524