Initial code for the common-modules/virtual-devices project

This is taken from the ToT android12-5.4 branches of

https://android.googlesource.com/kernel/cuttlefish-modules/+log/refs/heads/android12-5.4
a5d215d Enable CONFIG_USB_PULSE8_CEC

https://android.googlesource.com/kernel/goldfish-modules/+/refs/heads/android12-5.4


4e29067 Don't build the kernel image during the modules build step

To build, first make sure this is in a repo with common/ kernel and
build/ scripts.

To build Cuttlefish kernel modules:

BUILD_CONFIG=common-modules/virtual-device/build.config.cuttlefish.x86_64 build/build.sh

To build Goldfish kernel modules:

BUILD_CONFIG=common-modules/virtual-device/build.config.goldfish.x86_64 build/build.sh

The Goldfish config now includes the same virtio-gpu module used in
Cuttlefish.

Bug: 162770284
Bug: 163806467
Change-Id: I39bbd7224003d4632f3d0ddac4f93dd0c85a70e8
Signed-off-by: Lingfeng Yang <lfy@google.com>