Prevent classic ACL queue from getting stuck on command failure

Otherwise we get stuck in the case where outgoing_connecting_address_ is
populated but no events are pending.

Test: compiles + all existing cert / pts tests
Bug: 246640776
Tag: #stability
BYPASS_LONG_LINES_REASON: Bluetooth

Change-Id: I6fe98419b03e0c422f14d1c4544461dfc0115522