fix: add setValue for react-native-material-textfield (#40806)

types/react-native-material-textfield/index.d.ts

@@ -103,6 +103,10 @@ export class TextField extends React.Component<TextFieldProps, any> {
      * Get current restriction state
      */
     isRestricted(): boolean;
+    /*
+     * Set current value
+     */
+    setValue(value?: string): void;
 }
 
 export class OutlinedTextField extends TextField {}

types/react-native-material-textfield/react-native-material-textfield-tests.tsx

@@ -13,6 +13,7 @@ export class Example extends React.Component {
             this.textFieldRef.current.value();
             this.textFieldRef.current.isFocused();
             this.textFieldRef.current.isRestricted();
+            this.textFieldRef.current.setValue("Initial value");
         }
     }