audio policy: fix dynamic policy remote submix device removal

The life cycle of an IO profile on remote submix module
associated with a dynamic audio policy is different from other profiles
supporting removable devices with addresses: the profile must not be
cleaned up when the device is disconnected but when the dynamic policy
is unregistered.

Bug: 121200677
Test: phone call while connected to Android auto head unit simulator
Change-Id: I8c9f64697b736dab379a7d85b9d93568139e4e84