Improve Chinese localization in presence.

Discord currently supports "Playing, Listening to, Watching and Streaming" activity types.

Their current Chinese localization are as follow:

Playing xxx: 正在玩xxx

Listening to xxx: xxx 收聽中

Watching xxx: xxx 觀看中

Streaming xxx: xxx 實況中

I suggest changing the localization of Listening to, Watching and Streaming to something like Playing:

Listening to xxx: 正在聽 xxx

Watching xxx: 正在看 xxx

Streaming xxx: 正在直播 xxx