eventLogger: use anonymous user ID value for device ID
Created by: attfarhan
Instead of generating a new UUID for device ID, we want to use the anonymous user ID value already generated. These two values serve the same purpose, but we have some users that have both deviceIDs and anonymous user IDs, while many in the past only have anonymous user IDs. Therefore, we need to maintain both the device ID and anonymous user ID fields. This allows us to properly count users in Amplitude.
This will help us