Changes tree built Robolectric name

Bug: b/194219998
Test: locally ran all in-tree Robolectric tests
Change-Id: If13583f6a2882e2e78d3004afc476debf6692df9
Merged-In: If13583f6a2882e2e78d3004afc476debf6692df9
diff --git a/java/robolectric.go b/java/robolectric.go
index f216425..5d62aee 100644
--- a/java/robolectric.go
+++ b/java/robolectric.go
@@ -417,8 +417,10 @@
 		}
 		runtimeFromSourceJar := android.OutputFileForModule(ctx, runtimeFromSourceModule, "")
 
-		runtimeName := fmt.Sprintf("android-all-%s-robolectric-r0.jar",
-			    ctx.Config().PlatformSdkCodename())
+		// "TREE" name is essential here because it hooks into the "TREE" name in
+		// Robolectric's SdkConfig.java that will always correspond to the NEWEST_SDK
+		// in Robolectric configs.
+		runtimeName := "android-all-current-robolectric-r0.jar"
 		installedRuntime := ctx.InstallFile(androidAllDir, runtimeName, runtimeFromSourceJar)
 		r.runtimes = append(r.runtimes, installedRuntime)
 	}