Revert "configs: Add built-in mic to primary input sources"

This reverts commit 1c57390b961d2eaee6817d91e9453832780261bf.
As per surround sound recording design reverting this
commit to remove built-in mic from primary inputs.

CRs-fixed: 2128229
Change-Id: I1ab03aa76a7d70c87d02102c273370693d807ba7
1 file changed