Settings: Fix wifi developer options summaries

Change-Id: I85688d59685d3a0b0a48e51581eee77ebc7cd2fa
[settings] long press back to kill configurable timeout (2/2)

1 - 2 seconds (default)
2 - 1,5 seconds
3 - 1 second
4 - 0,5 second

Forward ported from crDroid kk