I have my Samsung Galaxy 4 set to automatically update. It is currently running 5.0.1 Lollipop.
Other apps still allow speech to text when the keyboard appears. It seems that Spotify is the only app that will not let me use this feature when the keyboard appears.
THIS IS NOT SAFE and should have an extremely high priority to fix because many people (including myself) are trying to type while driving because we need to find a specific song while driving. It used to be easy - click search and then hit the microphone and say "Girls Just Want To Have Fun" and voila.