Move phone fieldnames to Identity constants

src/services/autofill.service.ts

@@ -659,7 +659,7 @@ export default class AutofillService implements AutofillServiceInterface {
                     fillFields.country = f;
                     break;
                 } else if (!fillFields.phone && this.isFieldMatch(f[attr],
-                    ['phone', 'mobile', 'mobile-phone', 'tel', 'telephone', 'phone-number'])) {
+                    IdentityAutoFillConstants.PhoneFieldNames)) {
                     fillFields.phone = f;
                     break;
                 } else if (!fillFields.username && this.isFieldMatch(f[attr],

src/services/autofillConstants.ts

@@ -288,6 +288,15 @@ export class IdentityAutoFillConstants {
     "address-country-code",
   ];
 
+  static readonly PhoneFieldNames: string[] = [
+    "phone",
+    "mobile",
+    "mobile-phone",
+    "tel",
+    "telephone",
+    "phone-number",
+  ];
+
   static readonly IsoCountries: { [id: string]: string } = {
     afghanistan: "AF",
     "aland islands": "AX",