Early flag removal for ble_scan_setting

Note that this change is also behind respect_ble_scan_setting

Bug: 380917653
Bug: 379166793
Fix: 379166793
Test: m bluetooth | There are no automatic test for scan_setting
Flag: com.android.bluetooth.flags.ble_scan_setting_does_not_disconnect_if_bt_on
Change-Id: Ic19f534bcf8ad57b7c223bd6dbc699cca762a24d