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

src/com/android/launcher3/ButtonDropTarget.java

@@ -47,7 +47,6 @@ import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.dragndrop.DragOptions;
 import com.android.launcher3.dragndrop.DragView;
 import com.android.launcher3.model.data.ItemInfo;
-import com.android.launcher3.userevent.nano.LauncherLogProto.Target;
 import com.android.launcher3.util.Themes;
 import com.android.launcher3.util.Thunk;
 
@@ -395,6 +394,4 @@ public abstract class ButtonDropTarget extends TextView
                 TextUtils.TruncateAt.END);
         return !mText.equals(displayedText);
     }
-
-    public abstract Target getDropTargetForLogging();
 }