Changed the managed profile switching icon

Switched CrossProfileApps#getProfileSwitchingIconDrawable to use
PackageManager#getUserBadgeForDensityNoBackground which returns a
drawable that could be updated by the device management role holder.

Test: manual
Bug: 203548565
Bug: 188410712
Change-Id: Ia4246d7196b9d16e940d19752076b7d7f8916120