Set ringtone stream using audio attributes.

Move away from deprecated setStreamType which has some issues and
can potentially not properly mark the ringtone as a ringtone.
Use AudioAttributes which is the new supported API.

Test: Manual
Bug: 129694437
Change-Id: I6b7936ea60b2d364809437973a05bcffda0abb3e
AOSP: aosp/947037