Flag to set SCO state correctly on rfcomm disconct

Test: mmm packages/modules/Bluetooth
Flag:
com.android.bluetooth.flags.update_sco_state_correctly_on_rfcomm_disconnect_during_codec_nego
Bug: 351778741
Bug: 315241296

Change-Id: Ie057a985b14ac56f508c2fbb253a964562b59457