Comply w/ coding style

- Use 1 name for 1 abstraction. Instead of useFullScreen and enabled use
  fullScreen.
- Comments are correct English sentences so no double spaces between
  senteces, no capitalization of the work On midsentence.
- Write as little source code as possible if readability is preserved.
- Utilize Facebook's Flow.
- The name of a private function must start with _ and the jsdoc should
  state that the function is private.

android/settings.gradle

 rootProject.name = 'jitsi-meet-react'
-include ':react-native-immersive'
-project(':react-native-immersive').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-immersive/android')
 
 include ':app'
+include ':react-native-immersive'
+project(':react-native-immersive').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-immersive/android')
 include ':react-native-keep-awake'
 project(':react-native-keep-awake').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-keep-awake/android')
 include ':react-native-vector-icons'

package.json

     "bootstrap": "3.1.1",
     "i18next": "3.4.4",
     "i18next-xhr-backend": "1.1.0",
-    "jQuery-Impromptu": "trentrichardson/jQuery-Impromptu#v6.0.0",
     "jitsi-meet-logger": "jitsi/jitsi-meet-logger",
     "jquery": "~2.1.1",
     "jquery-contextmenu": "*",
     "jquery-i18next": "1.1.0",
+    "jQuery-Impromptu": "trentrichardson/jQuery-Impromptu#v6.0.0",
     "jquery-ui": "1.10.5",
     "jssha": "1.5.0",
     "jws": "*",

react/features/audio-mode/middleware.js

+/* @flow */
+
 import { NativeModules } from 'react-native';
 
 import { APP_WILL_MOUNT } from '../app';
         if (mode !== null) {
             AudioMode.setMode(mode)
                 .catch(err =>
-                    console.error(`Failed to set audio mode ${mode}: ${err}`));
+                    console.error(
+                            `Failed to set audio mode ${String(mode)}: `
+                                + `${err}`));
         }
     }
 

react/features/full-screen/middleware.js

+/* @flow */
+
 import { StatusBar } from 'react-native';
 import { Immersive } from 'react-native-immersive';
 
 
 /**
  * Middleware that captures conference actions and activates or deactivates the
- * full screen mode.  On iOS it hides the status bar, and on Android it uses the
+ * full screen mode. On iOS it hides the status bar, and on Android it uses the
  * immersive mode:
  * https://developer.android.com/training/system-ui/immersive.html
  * In immersive mode the status and navigation bars are hidden and thus the
  * @returns {Function}
  */
 MiddlewareRegistry.register(store => next => action => {
-    let useFullScreen;
+    let fullScreen;
 
     switch (action.type) {
     case CONFERENCE_WILL_JOIN: {
-        const state = store.getState()['features/base/conference'];
+        const conference = store.getState()['features/base/conference'];
 
-        useFullScreen = !state.audioOnly;
+        fullScreen = !conference.audioOnly;
         break;
     }
 
     case CONFERENCE_FAILED:
     case CONFERENCE_LEFT:
-        useFullScreen = false;
+        fullScreen = false;
         break;
 
     default:
-        useFullScreen = null;
+        fullScreen = null;
         break;
     }
 
-    if (useFullScreen !== null) {
-        setFullScreen(useFullScreen)
-            .catch(err => {
-                console.warn(`Error setting full screen mode: ${err}`);
-            });
+    if (fullScreen !== null) {
+        _setFullScreen(fullScreen)
+            .catch(err =>
+                console.warn(`Failed to set full screen mode: ${err}`));
     }
 
     return next(action);
 
 /**
  * Activates/deactivates the full screen mode. On iOS it will hide the status
- * bar and On Android this will turn on immersive mode.
+ * bar, and on Android it will turn immersive mode on.
  *
- * @param {boolean} enabled - True to set full screen mode, false to
+ * @param {boolean} fullScreen - True to set full screen mode, false to
  * deactivate it.
+ * @private
  * @returns {Promise}
  */
-function setFullScreen(enabled) {
-    // XXX The Immersive module is only implemented on Android and throws on
-    // other platforms.
+function _setFullScreen(fullScreen: boolean) {
+    // XXX The React Native module Immersive is only implemented on Android and
+    // throws on other platforms.
     if (Platform.OS === 'android') {
-        if (enabled) {
-            return Immersive.on();
-        }
-
-        return Immersive.off();
+        return fullScreen ? Immersive.on() : Immersive.off();
     }
 
-    StatusBar.setHidden(enabled, 'slide');
+    // On platforms other than Android go with whatever React Native itself
+    // supports.
+    StatusBar.setHidden(fullScreen, 'slide');
 
     return Promise.resolve();
 }