[gmscore] Enable multidexing for various test targets

components/BUILD.gn

Index: components/BUILD.gn
diff --git a/components/BUILD.gn b/components/BUILD.gn
index 5e9ecfcd94d435edfaf549da39837915924d28b6..38440d8eec63afe39ce5d8a2effe0f505dbf5a36 100644
--- a/components/BUILD.gn
+++ b/components/BUILD.gn
@@ -52,6 +52,10 @@ test("components_unittests") {
     ]
   }
 
+  if (is_android) {
+    enable_multidex = true
+  }
+
   # Add only ":unit_tests" dependencies here. If your tests have dependencies
   # (this would at least include the component itself), they should be on the
   # test source set and not here.