Enable speaker and microphone

1. Enabling audo devices for crosvm
2. Adding kernel config for virtio-snd
3. preinstall pulseaudio for the debian

Test: Play youtube music and use arecord to record sound
Bug: 393507771
Change-Id: Iee815cb7bf5cc12d0c745ec578f05b0dd2315448
diff --git a/build/debian/fai_config/package_config/AVF b/build/debian/fai_config/package_config/AVF
index ec68434..3aa8ab0 100644
--- a/build/debian/fai_config/package_config/AVF
+++ b/build/debian/fai_config/package_config/AVF
@@ -13,3 +13,4 @@
 mesa-vulkan-drivers
 libvulkan1
 vulkan-tools
+pulseaudio
diff --git a/build/debian/kernel/config b/build/debian/kernel/config
index 1ba603c..58e783a 100644
--- a/build/debian/kernel/config
+++ b/build/debian/kernel/config
@@ -1 +1,4 @@
 CONFIG_DRM=m
+CONFIG_SND_VIRTIO=y
+CONFIG_SND=y
+CONFIG_SOUND=y