Audio routing by strategy SystemApi

  Routing is done per AudioProductStrategy. For instance routing
media is done by using the AudioProductStrategy that supports
the AudioAttributes with USAGE_MEDIA.
  Routing is for a connected device, AudioDeviceInfo, or for on a
device that is not currently connected, uniquely specified by
its role, type and address.
  Preferred routing can be set, removed, queried (get).
  When audioserver crashes, AudioService restores the preferred
routing operating on the audio policy engine.

Bug: 144440677
Test: atest AudioServiceHostTest#PreferredDeviceRoutingTest

Change-Id: I0647608088fe2906e78b71341615975a56747c2f