Revert "Revert "Set apex_available property""

This reverts commit 56a712f6c93de93d4257ad50c20cda1a6b9b34da.

Reason for revert: forward fix is at aosp/1265379

Exempt-From-Owner-Approval: relanding of an already approved CL

Change-Id: I0d93417939d570ce21f105ee4b3bae6414194dbe
5 files changed