Set apex_available property

The marked library(ies) were available to the APEXes via the hand-written
whitelist in build/soong/apex/apex.go. Trying to remove the whitelist
by adding apex_available property to the Android.bp of the libraries.

Bug: 150999716
Test: m
Merged-In: I93926a0aa15f44e6a9874d0d9b46af4f3dcbaffa
Change-Id: I93926a0aa15f44e6a9874d0d9b46af4f3dcbaffa
1 file changed