Create an API to generate a content description for app name

Distinguishes a personal app from a work app for accessibility purpose.
If the app is in a work profile, then add a "work" prefix to the app name.

Test: Integrate with Settings app and talkback speaks correct
content for work profile app.
Bug: 127602715

Change-Id: I2c692bc0617566de5006c592f22a16dcf78cb5e7