Adding system usages to car volume settings

(Cherry-picked from 353ef627803f7b9e5417c7c07659edadf4e8846c)

Bug: 144872669
Test: Build, manually play around with volume settings
Change-Id: Ia5589689e5c37be3898ac1edb2df00b84280cb7d
Merged-In: Ia5589689e5c37be3898ac1edb2df00b84280cb7d
2 files changed