Revert "Default-disable tethering offload"

This reverts commit d09189112fcdcbbfd275d97e4e61fdbbffb0985e.

Bug: 29337859
Bug: 63250751
Test: builds, boots
Test: "dumpsys connectivity tethering" shows offload enabled
Test: wifi tethering continues to work
Change-Id: Ie3ef33f39ea20308ca50500139af3924c8831364
1 file changed