Make the enabled property configurable

This allows using select statements with it.

Ignore-AOSP-First: This needs to be in a topic with changes in interal-only repositories, I'll cherrypick to aosp after.
Bug: 323382414
Test: m nothing --no-skip-soong-tests
Change-Id: I6f3efaaa3d82505e38a91ee4ba0e18e404360191

rust/fuzz.go

@@ -20,6 +20,8 @@ import (
 	"android/soong/fuzz"
 	"android/soong/rust/config"
 	"path/filepath"
+
+	"github.com/google/blueprint/proptools"
 )
 
 func init() {
@@ -64,17 +66,14 @@ func NewRustFuzz(hod android.HostOrDeviceSupported) (*Module, *fuzzDecorator) {
 	android.AddLoadHook(module, func(ctx android.LoadHookContext) {
 
 		extraProps := struct {
-			Target struct {
-				Darwin struct {
-					Enabled *bool
-				}
-				Linux_bionic struct {
-					Enabled *bool
-				}
-			}
-		}{}
-		extraProps.Target.Darwin.Enabled = cc.BoolPtr(false)
-		extraProps.Target.Linux_bionic.Enabled = cc.BoolPtr(false)
+			Enabled proptools.Configurable[bool]
+		}{
+			Enabled: android.CreateSelectOsToBool(map[string]*bool{
+				"":             nil,
+				"darwin":       proptools.BoolPtr(false),
+				"linux_bionic": proptools.BoolPtr(false),
+			}),
+		}
 		ctx.AppendProperties(&extraProps)
 	})