SDK: add dev-python/grpcio for VMTests

After removing cloud-logging,
VMTests complain that it cannot import grpc.
This CL adds dev-python/grpcio to SDK for VM
tests.

BUG=b/303317695
TEST=presubmit SDK build and local image build
RELEASE_NOTE=Nonie

Change-Id: I1aa00ed1dc4b5feb5406be064cd0b892bc26b169
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/69051
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Chenglong Tang <chenglongtang@google.com>
diff --git a/virtual/target-chromium-os-sdk/target-chromium-os-sdk-1-r305.ebuild b/virtual/target-chromium-os-sdk/target-chromium-os-sdk-1-r306.ebuild
similarity index 98%
rename from virtual/target-chromium-os-sdk/target-chromium-os-sdk-1-r305.ebuild
rename to virtual/target-chromium-os-sdk/target-chromium-os-sdk-1-r306.ebuild
index 15004ab..0cd48c7 100644
--- a/virtual/target-chromium-os-sdk/target-chromium-os-sdk-1-r305.ebuild
+++ b/virtual/target-chromium-os-sdk/target-chromium-os-sdk-1-r306.ebuild
@@ -309,6 +309,11 @@
 
 # Host dependencies that are needed for unit tests
 RDEPEND+="
+	dev-python/grpcio
+	"
+
+# Host dependencies that are needed for unit tests
+RDEPEND+="
 	x11-misc/xkeyboard-config
 	"