Gracefully recover on bad attempt to cancel LE connection

According to logs some devices are stuck when in BLE_CONN_CANCEL state.
That is they sent "LE Create Connection Cancel" request, and are
awaiting "LE Connection Complete" event with invalid handle forever.
But they wait and wait, and the event never arrive. That's because
"LE Create Connection Cancel" was sent, when connection attempt is not
pending. In such case, we should act upon command complete status, and
decide to leave BLE_CONN_CANCEL state.

To properly fix this issue, one would have to implement a proper queue
for managing LE connection attempt state, preferably for scratch. This
fix just give option of graceful recovery.

Test: sl4a GattConnectTest
Bug: 75290221
Change-Id: I7e7a377c789ac0a587390320fbf504267cca8727
(cherry picked from commit b0a9f9f23f7405bc088695e1d91763aced70b9fd)