Generate actions when building the module graph.

This is necessary because GenerateAndroidBuildActions() is effectively a
mutator and therefore can change the data stored in each module.
Sometimes one wants to dump that data in the JSON module graph, and in
order to do so, actions need to be generated.

I briefly entertained removing StopBeforePrepareBuildActions(), but it
incurs a 10-second penalty on "m soong_docs" and "m bp2build" so I
decided to keep it.

Test: Presubmits.
Change-Id: I438aaf981e989dc39a09e8a2ba73f7a08ee55386

cmd/soong_build/main.go

@@ -217,15 +217,6 @@ func doChosenActivity(configuration android.Config, extraNinjaDeps []string) str
 	generateModuleGraphFile := moduleGraphFile != ""
 	generateDocFile := docFile != ""
 
-	blueprintArgs := cmdlineArgs
-
-	var stopBefore bootstrap.StopBefore
-	if !generateModuleGraphFile && !generateQueryView && !generateDocFile {
-		stopBefore = bootstrap.DoEverything
-	} else {
-		stopBefore = bootstrap.StopBeforePrepareBuildActions
-	}
-
 	if generateBazelWorkspace {
 		// Run the alternate pipeline of bp2build mutators and singleton to convert
 		// Blueprint to BUILD files before everything else.
@@ -233,6 +224,19 @@ func doChosenActivity(configuration android.Config, extraNinjaDeps []string) str
 		return bp2buildMarker
 	}
 
+	blueprintArgs := cmdlineArgs
+
+	var stopBefore bootstrap.StopBefore
+	if generateModuleGraphFile {
+		stopBefore = bootstrap.StopBeforeWriteNinja
+	} else if generateQueryView {
+		stopBefore = bootstrap.StopBeforePrepareBuildActions
+	} else if generateDocFile {
+		stopBefore = bootstrap.StopBeforePrepareBuildActions
+	} else {
+		stopBefore = bootstrap.DoEverything
+	}
+
 	ctx := newContext(configuration)
 	if mixedModeBuild {
 		runMixedModeBuild(configuration, ctx, extraNinjaDeps)