Fix missing system image error

This was missed in aosp/3466211.

Bug: 393373219
Test: m nothing
Change-Id: I3ded4ee87e3bd4e4360b92f6a6e9a45d01a985a3
diff --git a/fsgen/vbmeta_partitions.go b/fsgen/vbmeta_partitions.go
index 93425ae..11f4bd0 100644
--- a/fsgen/vbmeta_partitions.go
+++ b/fsgen/vbmeta_partitions.go
@@ -234,10 +234,14 @@
 			// Skip if the partition is not auto generated
 			continue
 		}
+		name := partitions.nameForType(partitionType)
+		if name == "" {
+			name = generatedModuleNameForPartition(ctx.Config(), partitionType)
+		}
 		if includeAsChainedPartitionInVbmeta(partitionType) {
-			chainedPartitionModules = append(chainedPartitionModules, generatedModuleNameForPartition(ctx.Config(), partitionType))
+			chainedPartitionModules = append(chainedPartitionModules, name)
 		} else if includeAsIncludedPartitionInVbmeta(partitionType) {
-			includePartitionModules = append(includePartitionModules, generatedModuleNameForPartition(ctx.Config(), partitionType))
+			includePartitionModules = append(includePartitionModules, name)
 		}
 	}