add plugins to javaLibraryAttributes

Test: go test ./bp2build
Change-Id: I8e4c3f373c62c60ea5013cd8c585915a366c1f81
diff --git a/java/java.go b/java/java.go
index 831d607..1b6e559 100644
--- a/java/java.go
+++ b/java/java.go
@@ -2026,6 +2026,7 @@
 
 type javaCommonAttributes struct {
 	Srcs      bazel.LabelListAttribute
+	Plugins   bazel.LabelListAttribute
 	Javacopts bazel.StringListAttribute
 }
 
@@ -2061,6 +2062,9 @@
 
 	commonAttrs := &javaCommonAttributes{
 		Srcs: srcPartitions[javaSrcPartition],
+		Plugins: bazel.MakeLabelListAttribute(
+			android.BazelLabelForModuleDeps(ctx, m.properties.Plugins),
+		),
 	}
 
 	if m.properties.Javacflags != nil {