Revert "Enable loading of treble-based plugins"

bug:35329920

Tests: Verfied playback on Ryu with Play Movies in combination with
ag/1907708, ag/1909159

This reverts commit fbf365037014e81711611384aeee9469590210f6.

Change-Id: I4a35a329b24e4cd9efcff4fe84e9d8901c714d57
4 files changed