Added react-native-share-extension (#41306)

* Added React Native Share Extension

* Fixed Linting Issues

Fixed linting issues, added tests.

* Fixed other linting issues

Data returns a promise.

* Removed Public from state

Removed public from state.

types/react-native-share-extension/index.d.ts

@@ -0,0 +1,18 @@
+// Type definitions for react-native-share-extension 2.0
+// Project: https://github.com/alinz/react-native-share-extension
+// Definitions by: Haseeb Majid <https://github.com/hmajid230>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+interface ShareData {
+    value: string;
+    type: 'text/plain' | 'images/*';
+}
+
+interface ShareExtension {
+    close(): void;
+    data(): Promise<ShareData>;
+    openURL(uri: string): void;
+}
+
+declare const RNShareExtension: ShareExtension;
+export default RNShareExtension;

types/react-native-share-extension/react-native-share-extension-tests.tsx

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+import * as React from 'react';
+import ShareExtension from 'react-native-share-extension';
+
+import { Text, View } from 'react-native';
+
+export default class Share extends React.Component {
+    state = {
+        type: '',
+        value: '',
+    };
+
+    async componentDidMount() {
+        try {
+            const { type, value } = await ShareExtension.data();
+            await ShareExtension.data();
+            ShareExtension.openURL('sample://example/url');
+            ShareExtension.close();
+            this.setState({
+                type,
+                value,
+            });
+        } catch (e) {
+            console.log('errrr', e);
+        }
+    }
+
+    render() {
+        return (
+            <View style={{ alignItems: 'center', justifyContent: 'center', flex: 1 }}>
+                <View
+                    style={{ borderColor: 'green', borderWidth: 1, backgroundColor: 'white', height: 200, width: 300 }}
+                >
+                    <Text>type: {this.state.type}</Text>
+                    <Text>value: {this.state.value}</Text>
+                </View>
+            </View>
+        );
+    }
+}

types/react-native-share-extension/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true,
+        "jsx": "react-native"
+    },
+    "files": [
+        "index.d.ts",
+        "react-native-share-extension-tests.tsx"
+    ]
+}

types/react-native-share-extension/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }