Hey, it seems like this topic has been out for quite a few months already but there's still been no implementation of this feature. Searching for songs is so important. Especially when building playlists and also if you've migrated from another platform.
If you wish to retain new users I would suggest implementing better navigation within the app. The bottom bar should always be visible, per Material Design guidelines for Android. And Search should be an easily accessible function. And even when you have your search results, like you to go an artist page, then you click on their discography and then on an album and play a song or add it to a playlist, it should be one single click away to return to the search field.
I am a new user and creating playlists is a nightmare especially because of the clunky interface when it comes to search and navigation. Otherwise I quite like Deezer.