Change PRODUCT_PRECOMPILED_SEPOLICY to a bool

Bug: 323382414
Test: m nothing --no-skip-soong-tests
Change-Id: I61ab8b38073414bea946dc680d35a2cfb7f76838
diff --git a/Android.bp b/Android.bp
index 1a2d1ef..dc6761c 100644
--- a/Android.bp
+++ b/Android.bp
@@ -123,7 +123,7 @@
             "202404.compat.cil",
         ],
     }) + select(soong_config_variable("ANDROID", "PRODUCT_PRECOMPILED_SEPOLICY"), {
-        "true": ["plat_sepolicy_and_mapping.sha256"],
+        true: ["plat_sepolicy_and_mapping.sha256"],
         default: [],
     }),
 }