import HashMap

Summary:
Project won't build otherwise

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Closes #14835

Differential Revision: D5375496

Pulled By: javache

fbshipit-source-id: 415abb0fd257a4f871acbcb89be26b10b96a01c6

docs/NativeModulesAndroid.md

@@ -35,6 +35,7 @@ import com.facebook.react.bridge.ReactContextBaseJavaModule;
 import com.facebook.react.bridge.ReactMethod;
 
 import java.util.Map;
+import java.util.HashMap; 
 
 public class ToastModule extends ReactContextBaseJavaModule {