Evaluation stubs for NEON F32->F16 conversion

PiperOrigin-RevId: 408091290
diff --git a/BUILD.bazel b/BUILD.bazel
index 35b00e2..b9da038 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -2421,6 +2421,7 @@
     "src/f32-vunary/gen/vsqr-neon-x8.c",
     "src/math/cvt-f16-f32-neon-int16.c",
     "src/math/cvt-f16-f32-neon-int32.c",
+    "src/math/cvt-f32-f16-neon.c",
     "src/math/expm1minus-neon-rr2-lut16-p3.c",
     "src/math/expm1minus-neon-rr2-p6.c",
     "src/math/roundd-neon-addsub.c",