Use MDC CollectionCells bundle.

ios/third_party/material_components_ios/BUILD.gn

Index: ios/third_party/material_components_ios/BUILD.gn
diff --git a/ios/third_party/material_components_ios/BUILD.gn b/ios/third_party/material_components_ios/BUILD.gn
index 900488c81acd37d6d0ee8bb8b4ff1f9b5ae9bd48..bdb12bebb805474d99387a8efbf0ad88191fe043 100644
--- a/ios/third_party/material_components_ios/BUILD.gn
+++ b/ios/third_party/material_components_ios/BUILD.gn
@@ -248,6 +248,7 @@ source_set("material_components_ios") {
   ]
 
   deps = [
+    ":material_collection_cells_bundle",
     ":material_collections_bundle",
     ":material_component_ic_arrow_back_bundle",
     "//ios/third_party/material_text_accessibility_ios",
@@ -277,6 +278,29 @@ bundle_data("material_collections_bundle") {
   ]
 }
 
+_locales = [ "en" ]
+
+foreach(locale, _locales) {
+  bundle_data("material_collection_cells_bundle_$locale") {
+    visibility = [ ":material_collection_cells_bundle" ]
+    sources = [
+      "src/components/CollectionCells/src/MaterialCollectionCells.bundle/Resources/$locale.lproj/MaterialCollectionCells.strings",
+    ]
+    outputs = [
+      "{{bundle_resources_dir}}/MaterialCollectionCells.bundle/Resources/$locale.lproj/{{source_file_part}}",
+    ]
+  }
+}
+
+group("material_collection_cells_bundle") {
+  visibility = [ ":material_components_ios" ]
+
+  deps = []
+  foreach(locale, _locales) {
+    deps += [ ":material_collection_cells_bundle_$locale" ]
+  }
+}
+
 # TODO(crbug.com/662421): Move back to _icon_names when there is just one
 # resource.
 bundle_data("material_component_ic_arrow_back_bundle") {