Don't notify java state machine about failure when the remote device is already connected

When there is a HFP collision, the phone accepts remote request, and fails the outgoing request
When outgoing request cancelled, native layer notifies java layer as disconnected.
This confuses the java state machine to make a reconnection.
This change target to not notify java layer for the failure.

Bug: 341209537
Bug: 346679106
Test: m packages/modules/Bluetooth with Manual testing
Flag: com.android.bluetooth.flags.ignore_notify_when_already_connected
Change-Id: Id075f20fecdcd6369f8f41bbff17b2dc6fd13efb