hal: Add support for LINE out device

Add support for AUDIO_DEVICE_OUT_LINE device. Treat it same
as Wired Headphone device w.r.t. routing and acdb device.
If the acdb or backend is different it can be updated using
audio_platform_info.xml.

Change-Id: I203f38b1629a837478da1ae304a67bb016b06fa7
CRs-Fixed: 929500
2 files changed