DO NOT MERGE Fix potential DoS caused by delivering signal to BT process

Bug: 28885210
Change-Id: I63866d894bfca47464d6e42e3fb0357c4f94d360

 Conflicts:
	btif/co/bta_hh_co.c
	btif/src/btif_core.c
Merge conflict resolution of ag/1161415 (referencing ag/1164670)
- Directly into mnc-mr2-release

static int in_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
{
    UNUSED(stream);
    UNUSED(effect);

    FNLOG();

 return 0;
}

static int in_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
{
    UNUSED(stream);
    UNUSED(effect);

    FNLOG();

 return 0;
}
