Update the final 28.txt before release.

Add libminijail.so to VNDK list.

Bug: 63866913
Test: Build sailfish and libminijail.so should be installed into
/system/lib[64]/vndk/libminijail.so instead of
/vendor/lib[64]/libminijail.so.

Change-Id: I611598f0fc700dcee7829badb975479803c8b7ad