Add scalar chw 5x5p2 and 5x5s2p2 kernels

PiperOrigin-RevId: 279361629
diff --git a/BUILD.bazel b/BUILD.bazel
index fd9afb7..25184d1 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -99,7 +99,9 @@
     "src/f32-dwconv/up2x9-scalar.c",
     "src/f32-dwconv/up2x9-scalar-acc2.c",
     "src/f32-dwconv-spchw/3x3p1-scalar.c",
+    "src/f32-dwconv-spchw/5x5p2-scalar.c",
     "src/f32-dwconv-spchw/3x3s2p1-scalar.c",
+    "src/f32-dwconv-spchw/5x5s2p2-scalar.c",
     "src/f32-gavgpool-spchw/scalar-x1.c",
     "src/f32-gavgpool/mp7p7q-scalar.c",
     "src/f32-gavgpool/up7-scalar.c",