policy_hal: update custom audio policy against OPR1.170521.001_AOSP

Update custom audio policy implementation APIs against below O-AOSP updates.

1. audio policy manager: do not reapply same forced usage

Skip systematic audio path and volume reevaluation when the new
forced configuration for the selected usage is the same as current one.
Bug: 38276985
commit:	8dc87a60e69f462e0382d025c335e45699025b48
Change-Id: Id43a5270c666065e099d02d9e52de86b20cb8039

2. audio policy: always provide a valid device address when opening a stream

Treble audio HAL mandates that a valid device address is passed when
opening an output or input stream and teh device type requires and
address.
Bug: 37905534
commit:	e301410b8495a3702e21019e92d44ade2a3f81d1
Change-Id: I12f2128120b1bbe8530e8c2428e3e2cba1ba1535

3. audio policy: fix global effect attachment

Fix logic for global music effects (e.g Visualizer) attachement to
output streams.
- Consider only outputs with active music sessions first and then all
outputs
- Reevaluate effect attachment systematically on music playback start/stop
and when outputs are opened/closed
- Use the same logic every where.
Bug: 33397379
commit: 36829f97c0c547d9c6c918e248071cc616818616
Change-Id: Iabc23bc8a24f36b68942b7f32749c535781497b4

4. audio policy: disable concurrent capture

Disable concurrent capture until the corresponding UI is available.
Restore preemption for HOTWORD audio source.
Bug:36891272
commit: 74708e7c4622d65a7798d5fa9347c55583d347fe
Change-Id: I1b6c32c2a76ae0e004e14e46fedd596a8844c0d4

Change-Id: I1d59377e9892350b8f6a33de5640a90c4b6cdc5f