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

reactor_status_t reactor_run_once(reactor_t *reactor) {
  assert(reactor != NULL);
 return run_reactor(reactor, 1);
}

reactor_status_t reactor_run_once(reactor_t *reactor) {
  assert(reactor != NULL);
 return run_reactor(reactor, 1);
}
