audio policy: phone strategy routing based on preferred device API

Use preferred device API instead of forced usage to select
audio route for phone strategy in default audio policy engine.

Also remove use of forced usage for record which was redundant with
forced usage for communication (never used independently).

Bug: 161358428
Test: audio smoke tests
Change-Id: Ie0c36b69ae6849c6efe7b5602dc9d0322856f561
Merged-In: Ie0c36b69ae6849c6efe7b5602dc9d0322856f561