feat: stop bt headset on end of speech csdcorp#210

feat: simple reproduce for web issues csdcorp#242

doc: 5.2.0 compileSdkVersion note

rf: minor formatting issue

rf: depend on 2.0.0 interface

Release version 4.0.0

doc: version number 3.0.1

doc: 3.0.0 changelog

fix: duplicate var

doc: 2.4.0 release docs