Add audio-graph overlay for the supported audio cards. In doing so also update license header as per recommended style. Bug 200692799 Change-Id: I7cbf9835026cec173f70ba307394a7ee6b7cc437 Reviewed-on: https://git-master.nvidia.com/r/c/device/hardware/nvidia/platform/tegra/common/+/2641874 Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com> Reviewed-by: Mohan Kumar D <mkumard@nvidia.com> Reviewed-by: Sameer Pujar <spujar@nvidia.com> Reviewed-by: Sharad Gupta <sharadg@nvidia.com> Tested-by: Sameer Pujar <spujar@nvidia.com> GVS: Gerrit_Virtual_Submit