feat(i18n): Add NgLocaleLocalization which returns plural cases given a locale (#10744)

tools/public_api_guard/common/index.d.ts

@@ -36,6 +36,9 @@ export declare class DecimalPipe implements PipeTransform {
     transform(value: any, digits?: string): string;
 }
 
+/** @experimental */
+export declare function getPluralCase(locale: string, nLike: number | string): Plural;
+
 /** @stable */
 export declare class HashLocationStrategy extends LocationStrategy {
     constructor(_platformLocation: PlatformLocation, _baseHref?: string);
@@ -129,6 +132,12 @@ export declare class NgIf {
     constructor(_viewContainer: ViewContainerRef, _templateRef: TemplateRef<Object>);
 }
 
+/** @experimental */
+export declare class NgLocaleLocalization extends NgLocalization {
+    constructor(_locale: string);
+    getPluralCategory(value: any): string;
+}
+
 /** @experimental */
 export declare abstract class NgLocalization {
     abstract getPluralCategory(value: any): string;
@@ -213,6 +222,16 @@ export declare abstract class PlatformLocation {
     abstract replaceState(state: any, title: string, url: string): void;
 }
 
+/** @experimental */
+export declare enum Plural {
+    Zero = 0,
+    One = 1,
+    Two = 2,
+    Few = 3,
+    Many = 4,
+    Other = 5,
+}
+
 /** @deprecated */
 export declare class ReplacePipe implements PipeTransform {
     transform(value: any, pattern: string | RegExp, replacement: Function | string): any;