Revert "Default from-text stub generation in build"

This reverts commit 182b56b870c52a204055eb32c583828ac0ac0fa4.

Reason for revert: prime suspect for breaking boot tests b/307495247, b/307411752

Bug:307495247
Change-Id: Iea05703b767d2699ca3cf69377eb44b1d21697ad
diff --git a/ui/build/config.go b/ui/build/config.go
index eae379f..5925b28 100644
--- a/ui/build/config.go
+++ b/ui/build/config.go
@@ -85,7 +85,7 @@
 	searchApiDir             bool // Scan the Android.bp files generated in out/api_surfaces
 	skipMetricsUpload        bool
 	buildStartedTime         int64 // For metrics-upload-only - manually specify a build-started time
-	buildFromSourceStub      bool
+	buildFromTextStub        bool
 	ensureAllowlistIntegrity bool   // For CI builds - make sure modules are mixed-built
 	bazelExitCode            int32  // For b runs - necessary for updating NonZeroExit
 	besId                    string // For b runs, to identify the BuildEventService logs
@@ -808,8 +808,8 @@
 			} else {
 				ctx.Fatalf("unknown option for ninja_weight_source: %s", source)
 			}
-		} else if arg == "--build-from-source-stub" {
-			c.buildFromSourceStub = true
+		} else if arg == "--build-from-text-stub" {
+			c.buildFromTextStub = true
 		} else if strings.HasPrefix(arg, "--build-command=") {
 			buildCmd := strings.TrimPrefix(arg, "--build-command=")
 			// remove quotations
@@ -1157,7 +1157,7 @@
 }
 
 func (c *configImpl) BuildFromTextStub() bool {
-	return !c.buildFromSourceStub
+	return c.buildFromTextStub
 }
 
 func (c *configImpl) TargetProduct() string {