Fixes missing components info when logging Widget item.

Sample Log:

LAUNCHER_ITEM_DRAG_STARTED
    # com.android.launcher3.logger.LauncherAtom$ItemInfo@5c06a6d1
    container_info {
      workspace {
        grid_x: 3
        grid_y: 3
        page_index: 3
      }
    }
    is_work: false
    widget {
      component_name: "com.google.android.deskclock/com.android.alarmclock.DigitalAppWidgetProvider"
      package_name: "com.google.android.deskclock"
      span_x: 2
      span_y: 1
    }

Change-Id: I3d468c77632c694454fcdca24f9d2ccd1c4f918c