Code:
adb pull /data/data/com.bn.devicemanager/databases/devicemanager.db devicemanager.db
sqlite3 devicemanager.db "update registry set value='manual' where name='com.bn.device.fota.mode';"
adb push devicemanager.db /data/data/com.bn.devicemanager/databases/devicemanager.db
sqlite3 binary available here.