RootCanal: Implement LE advertising timeouts

- Send LE Connection Complete event with error Advertising Timeout
  when high duty cycle directed advertising timeouts
- Send LE Advertising Set Terminated event when
  extended advertising set timeout

Test: m root-canal
Tag: feature
Change-Id: I5d9be90ab2b8bb4c8b75b0660eb507381d1d6d3d