audiopolicy: support extended feature in audiopolicymanager

This is a squashed commit of the changes added to support
extended feature in audiopolicymanager and related error.
Only some parts of the fixes have been ported as the custom
audio policy has the other required changes.

audiopolicy: support extended feature in audiopolicymanager
audiopolicy: additional change for extended feature
audiopolicy: Add voip flag to output flag list
Change-Id: I7738d4b0ac11ee6d93bfd67e2553eae8518ff719
audiopolicy: follow-up change to support extended feature
Change-Id: Iddc14a3e2e61bc57f8637eae71e36cc21ce2d3e8

[dianlujitao: Port to R]

CRs-Fixed: 2208307
Change-Id: Icc12395480cfe5e26bf935fb643d080990d8a4e9