Use audio_port_v7 in audio policy.

audio_port_v7 is a struct that uses audio profile to describe an audio
port. Compared to audio_port, audio_port_v7 can better describe the
capabilities of the audio port. In that case, use audio_port_v7 in audio
policy APIs getAudioPort and listAudioPort.

Test: atest audio_health_tests audiopolicy_tests AudioManagerTest
Bug: 160352965
Bug: 25994457
Change-Id: I16fb024f309e33f48ce2ae8f8d37dd58e74f781d