Soong system image may update the $PRODUCT_OUT

A target must define "USE_SOONG_DEFINED_SYSTEM_IMAGE := true" and
"PRODUCT_SOONG_DEFINED_SYSTEM_IMAGE := <name of soong system image>"
to use the soong defined system image.
The system image must install the files to $PRODUCT_OUT for adb sync
and build verification. Instead of using 'update_product_out'
property in Android.bp, copy the files only if the name of the image
matches with PRODUCT_SOONG_DEFINED_SYSTEM_IMAGE.

Bug: 350599535
Bug: 365700376
Test: lunch aosp_x86_64-trunk_staging-userdebug && m &&
      m aosp_cf_system_x86_64
Test: lunch aosp_cf_x86_64_phone_soong_system-trunk_staging-userdebug
      && m
      and adb sync on the cf device
Change-Id: If8673ba2855a753a5559a588bd83068d950fd7e4

filesystem/filesystem.go

@@ -136,9 +136,6 @@ type filesystemProperties struct {
 	// Install aconfig_flags.pb file for the modules installed in this partition.
 	Gen_aconfig_flags_pb *bool
 
-	// Update the Base_dir of the $PRODUCT_OUT directory with the packaging files.
-	Update_product_out *bool
-
 	Fsverity fsverityProperties
 }
 
@@ -335,7 +332,7 @@ func (f *filesystem) copyPackagingSpecs(ctx android.ModuleContext, builder *andr
 }
 
 func (f *filesystem) copyFilesToProductOut(ctx android.ModuleContext, builder *android.RuleBuilder, rebasedDir android.OutputPath) {
-	if !proptools.Bool(f.properties.Update_product_out) {
+	if f.Name() != ctx.Config().SoongDefinedSystemImage() {
 		return
 	}
 	installPath := android.PathForModuleInPartitionInstall(ctx, f.partitionName())