Good riddance UserEventDispatcher

Bug: 165675920
Bug: 161381246

TL;DR;;
- nano -> lite proto
- add all the missing logs to WW
- pin item related logging fix
- Removed logging for assistant

sgrep "com.android.launcher3.userevent.nano." | cut -f1 -d: | xargs sed -i -e 's/userevent\.nano\./userevent\./g'

Change-Id: Ie2a49fdd891cacbd7ef40a1dc9e41ff0574c7517