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 void event_packet_ready(fixed_queue_t *queue, UNUSED_ATTR void *context) {
  BT_HDR *packet = (BT_HDR *)fixed_queue_dequeue(queue);

  low_power_manager->wake_assert();
  packet_fragmenter->fragment_and_dispatch(packet);
  low_power_manager->transmit_done();
}

static void event_packet_ready(fixed_queue_t *queue, UNUSED_ATTR void *context) {
  BT_HDR *packet = (BT_HDR *)fixed_queue_dequeue(queue);

  low_power_manager->wake_assert();
  packet_fragmenter->fragment_and_dispatch(packet);
  low_power_manager->transmit_done();
}
