FTL: Add std::variant matcher

Bug: 185536303
Test: ftl_test
Change-Id: Id6357fa04ffe0c17b17c99b49b5a5262d68925bf
diff --git a/libs/ftl/Android.bp b/libs/ftl/Android.bp
index a25a493..c1945fd 100644
--- a/libs/ftl/Android.bp
+++ b/libs/ftl/Android.bp
@@ -21,6 +21,7 @@
         "fake_guard_test.cpp",
         "flags_test.cpp",
         "future_test.cpp",
+        "match_test.cpp",
         "optional_test.cpp",
         "small_map_test.cpp",
         "small_vector_test.cpp",