infra/gerrit-plugins: Enable mandatory code review

Enable code-owners plugin and disallow self-Code-Review.

Change-Id: I16a97c346672938abaadfc8ae043a73cad22e84f
diff --git a/code-owners.config b/code-owners.config
new file mode 100644
index 0000000..26cd823
--- /dev/null
+++ b/code-owners.config
@@ -0,0 +1,2 @@
+[codeOwners]
+	disabled = false
diff --git a/project.config b/project.config
index 42e132c..e106a51 100644
--- a/project.config
+++ b/project.config
@@ -10,3 +10,14 @@
 [label "Commit-Queue"]
 	function = MaxWithBlock
 	defaultValue = 0
+[label "Code-Review"]
+	abbreviation = R
+	value = -1 Don't submit as-is
+	value = 0 No score
+	value = +1 Looks good to me
+	defaultValue = 0
+	function = MaxWithBlock
+	copyMaxScore = true
+	copyAllScoresOnTrivialRebase = true
+	copyAllScoresIfNoCodeChange = true
+	ignoreSelfApproval = true