ANDROID: Add snd-aloop.ko symbols to abi_gki_aarch64_virtual_device

Needed to build the module for Cuttlefish, to support 6-channel audio
downmixed to 2 channels supported with virtio-snd.

More context: go/sdv-multi-channel-audio-on-cf

Bug: 376630941
Test: for ARCH in aarch64 aarch64_16k x86_64; do
Test:   tools/bazel run //common-modules/virtual-device:virtual_device_${ARCH}_dist
Test: done
Test: file out/virtual_device_*/dist/snd-aloop.ko
Change-Id: I1c15f167186fb6377ab68a6e4ba9931a5b456e76
Signed-off-by: Marcin Radomski <dextero@google.com>