migrate music app tests to app object
Merge pull request #14027 from sashakruglov/music_application

migrate music app tests to app object
Bug 933203 - [DSDS] Operator variant logic: APN settings
Bug 928297 - [DSDS][Gaia] Settings app should support cellular & data settings of multiple sim cards
Bug 928297 - [DSDS][Gaia] Settings app should support cellular & data settings of multiple sim cards