audio policy: remove effects before releasing input

modify releaseInput() implementation so that effects added by policy
rules are removed before closing the input stream to avoid
failure to destroy the effect chain

make sure that orphan effect chains are checked when an EffectHandle is
disconnected after thread destruction.

Test: make and run Hangouts
Bug: 32707507

Change-Id: I7833b4c5e42c0057a4477eb4485a20dd26ca2f90