Quit current app before starting new playback
Quit current app before starting new playback

====  Tech Notes ====
Before the current chromecast application was quit when mycroft was started which caused some interference. Now the current app is quit right before starting playback on the device instead.

MycroftAI/mycroft-core,Dark5ide/mycroft-core,forslund/mycroft-core,linuxipho/mycroft-core,MycroftAI/mycroft-core,forslund/mycroft-core,Dark5ide/mycroft-core,linuxipho/mycroft-core