[docs] Update Android instructions and misc module page fixes (#2601)

docs/firestore/android.md

@@ -3,4 +3,54 @@ title: Android Setup
 description: Manually integrate Cloud Firestore into your Android application.
 ---
 
-# Android Manual Linking
+# Android Manual Installation
+
+The following steps are only required if you are using React Native <= 0.59 or need to manually integrate the library.
+
+#### Update Gradle Settings
+
+Add the following to your projects `/android/settings.gradle` file:
+
+```groovy
+include ':@react-native-firebase_firestore'
+project(':@react-native-firebase_firestore').projectDir = new File(rootProject.projectDir, './../node_modules/@react-native-firebase/firestore/android')
+```
+
+#### Update Gradle Dependencies
+
+Add the React Native Firestore module dependency to your `/android/app/build.gradle` file:
+
+```groovy{3}
+dependencies {
+  ...
+  implementation project(path: ":@react-native-firebase_firestore")
+}
+```
+
+#### Add package to the Android Application
+
+Import and apply the React Native Firebase module package to your `/android/app/src/main/java/**/MainApplication.java` file:
+
+Import the package:
+
+```java
+import io.invertase.firebase.analytics.ReactNativeFirebaseFirestorePackage;
+```
+
+Add the package to the registry:
+
+```java{4}
+protected List<ReactPackage> getPackages() {
+  return Arrays.asList(
+    new MainReactPackage(),
+    new ReactNativeFirebaseFirestorePackage(),
+```
+
+#### Rebuild the project
+
+Once the above steps have been completed, rebuild your Android project:
+
+```bash
+react-native run-android
+```
+

docs/firestore/index.md

@@ -49,5 +49,5 @@ Our documentation is a great place to start, however if you're looking for more
 check out the resources below:
 
 - [Stack Overflow](https://stackoverflow.com/questions/tagged/react-native-firebase-firestore)
-- [Github Issues](https://github.com/invertase/react-native-firebase/issues?utf8=%E2%9C%93&q=is%3Aissue+sort%3Aupdated-desc+label%3Afirestore+)
+- [Github Issues](https://github.com/invertase/react-native-firebase/labels/Service%3A%20Firestore)
 - [Firebase Documentation](https://firebase.google.com/docs/firestore?utm_source=invertase&utm_medium=react-native-firebase&utm_campaign=firestore)

docs/firestore/quick-start.md

@@ -8,7 +8,7 @@ description: Getting started with Cloud Firestore in React Native Firebase
 ## Module usage
 
 This module depends on the `@react-native-firebase/app` module. To get started and install `app`,
-visit the projects <Anchor version={false} group={false} href="/quick-start">quick start</Anchor> guide. 
+visit the project's <Anchor version={false} group={false} href="/quick-start">quick start</Anchor> guide.
 
 The Cloud Firestore module follows the same API as the [Web SDK](https://firebase.google.com/docs/reference/js/firebase.firestore), however takes advantage of the native SDKs. This provides advantages such as improved performance versus using the Web SDK, as all work is carried out natively in separate threads, preventing issues such as [jank](https://facebook.github.io/react-native/docs/performance#js-frame-rate-javascript-thread). The module also works in offline mode, using device storage.