Print a dash for the unused "lastUsed" of the rule. The age should not equal the bootime if the rule has never been updated the "lastUsed" field. Format: [inDstMac] iif(iface) src -> nat -> dst [outDstMac] age [00:00:00:00:00:00] 14(rmnet0) 140.112.8.116:443 -> 30(30) 10.170.56.233:43720 -> 192.168.45.236:43720 [be:34:40:28:33:5f] - Test: dumpsys tethering Change-Id: Ie771becd2f72518cf02a86e5ae228315785752a5