FTL: Pull Flags into namespace

Bug: 185536303
Test: Build
Change-Id: Ia9aafc78565414815dfc14732ce85b06fa96e17b
diff --git a/libs/ftl/Android.bp b/libs/ftl/Android.bp
index ef20196..c010a2e 100644
--- a/libs/ftl/Android.bp
+++ b/libs/ftl/Android.bp
@@ -14,11 +14,11 @@
         address: true,
     },
     srcs: [
-        "Flags_test.cpp",
         "cast_test.cpp",
         "concat_test.cpp",
         "enum_test.cpp",
         "fake_guard_test.cpp",
+        "flags_test.cpp",
         "future_test.cpp",
         "small_map_test.cpp",
         "small_vector_test.cpp",