mForwardedDownstreams is the set of downstreams who wanted upstream. In other word, it don't contains localOnly tethering(e.g. local only hotspot, wifi p2p tethering). Changing the list from mForwardedDownstreams to mNotifyList make both tethered and localOnly tethering have connected clients callback. Bug: 172290164 Test: atest TetheringTests Change-Id: I58fdb28efc616b00d63a1c237ea93aee4d8f2dcd