support errorprone javacflags

Soong has a separate property specifically for errorprone javacflags
that we need to add to the Bazel javacopts.

Test: go test ./bp2build
Change-Id: I5299f45793d2b05a6a71b94dd17ceb797f407846

java/java.go

@@ -2060,15 +2060,22 @@ func (m *Library) convertLibraryAttrsBp2Build(ctx android.TopDownMutatorContext)
 		protoSrcPartition: android.ProtoSrcLabelPartition,
 	})
 
+	var javacopts []string
+	if m.properties.Javacflags != nil {
+		javacopts = append(javacopts, m.properties.Javacflags...)
+	}
+	epEnabled := m.properties.Errorprone.Enabled
+	//TODO(b/227504307) add configuration that depends on RUN_ERROR_PRONE environment variable
+	if Bool(epEnabled) {
+		javacopts = append(javacopts, m.properties.Errorprone.Javacflags...)
+	}
+
 	commonAttrs := &javaCommonAttributes{
 		Srcs: srcPartitions[javaSrcPartition],
 		Plugins: bazel.MakeLabelListAttribute(
 			android.BazelLabelForModuleDeps(ctx, m.properties.Plugins),
 		),
-	}
-
-	if m.properties.Javacflags != nil {
-		commonAttrs.Javacopts = bazel.MakeStringListAttribute(m.properties.Javacflags)
+		Javacopts: bazel.MakeStringListAttribute(javacopts),
 	}
 
 	depLabels := &javaDependencyLabels{}