audio: select camcorder snd device according to camera orientation

Add audio parameter indicating use of front or back camera to select
proper input path tuning in camcorder mode.
Also take device orientation for stereo channel swaping.

Bug: 118022272

Test: verified with camera service patch sending camera facing parameter
Change-Id: If24b47d922aeedaaa144f4a5f4cacddce2c9eeaf