Make TransitiveInfoProviderMap an interface.

PiperOrigin-RevId: 155125357
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/MergedConfiguredTarget.java b/src/main/java/com/google/devtools/build/lib/analysis/MergedConfiguredTarget.java
index aff014f..f2a8781 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/MergedConfiguredTarget.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/MergedConfiguredTarget.java
@@ -78,7 +78,7 @@
     ExtraActionArtifactsProvider mergedExtraActionProviders = ExtraActionArtifactsProvider.merge(
         getAllProviders(base, aspects, ExtraActionArtifactsProvider.class));
 
-    TransitiveInfoProviderMap.Builder aspectProviders = TransitiveInfoProviderMap.builder();
+    TransitiveInfoProviderMapBuilder aspectProviders = new TransitiveInfoProviderMapBuilder();
     if (mergedOutputGroupProvider != null) {
       aspectProviders.add(mergedOutputGroupProvider);
     }