feat(rn) add polyfill for the performance API

Implements: https://developer.mozilla.org/en-US/docs/Web/API/Performance
Ref: https://github.com/oblador/react-native-performance

android/sdk/build.gradle

     implementation project(':react-native-default-preference')
     implementation project(':react-native-immersive')
     implementation project(':react-native-keep-awake')
+    implementation project(':react-native-performance')
     implementation project(':react-native-slider')
     implementation project(':react-native-sound')
     implementation project(':react-native-splash-screen')

android/sdk/src/main/java/org/jitsi/meet/sdk/ReactInstanceManagerHolder.java

                 new com.horcrux.svg.SvgPackage(),
                 new com.kevinresol.react_native_default_preference.RNDefaultPreferencePackage(),
                 new com.learnium.RNDeviceInfo.RNDeviceInfo(),
+                new com.oblador.performance.PerformancePackage(),
                 new com.ocetnik.timer.BackgroundTimerPackage(),
                 new com.reactnativecommunity.asyncstorage.AsyncStoragePackage(),
                 new com.reactnativecommunity.netinfo.NetInfoPackage(),

android/settings.gradle

 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-performance'
+project(':react-native-performance').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-performance/android')
 include ':react-native-slider'
 project(':react-native-slider').projectDir = new File(rootProject.projectDir, '../node_modules/@react-native-community/slider/android')
 include ':react-native-sound'

ios/Podfile

   pod 'react-native-calendar-events', :path => '../node_modules/react-native-calendar-events'
   pod 'react-native-keep-awake', :path => '../node_modules/react-native-keep-awake'
   pod 'react-native-netinfo', :path => '../node_modules/@react-native-community/netinfo'
+  pod 'react-native-performance', :path => '../node_modules/react-native-performance/ios'
   pod 'react-native-slider', :path => '../node_modules/@react-native-community/slider'
   pod 'react-native-splash-screen', :path => '../node_modules/react-native-splash-screen'
   pod 'react-native-video', :path => '../node_modules/react-native-video/react-native-video.podspec'

ios/Podfile.lock

     - React
   - react-native-netinfo (4.1.5):
     - React
+  - react-native-performance (2.0.0):
+    - React-Core
   - react-native-slider (3.0.3):
     - React
   - react-native-splash-screen (3.2.0):
   - react-native-calendar-events (from `../node_modules/react-native-calendar-events`)
   - react-native-keep-awake (from `../node_modules/react-native-keep-awake`)
   - "react-native-netinfo (from `../node_modules/@react-native-community/netinfo`)"
+  - react-native-performance (from `../node_modules/react-native-performance/ios`)
   - "react-native-slider (from `../node_modules/@react-native-community/slider`)"
   - react-native-splash-screen (from `../node_modules/react-native-splash-screen`)
   - react-native-video (from `../node_modules/react-native-video/react-native-video.podspec`)
     :path: "../node_modules/react-native-keep-awake"
   react-native-netinfo:
     :path: "../node_modules/@react-native-community/netinfo"
+  react-native-performance:
+    :path: "../node_modules/react-native-performance/ios"
   react-native-slider:
     :path: "../node_modules/@react-native-community/slider"
   react-native-splash-screen:
   react-native-calendar-events: 1442fad71a00388f933cfa25512588fec300fcf8
   react-native-keep-awake: eba3137546b10003361b37c761f6c429b59814ae
   react-native-netinfo: 8d8db463bcc5db66a8ac5c48a7d86beb3b92f61a
+  react-native-performance: 8edfa2bbc9a2af4a02f01d342118e413a95145e0
   react-native-slider: b733e17fdd31186707146debf1f04b5d94aa1a93
   react-native-splash-screen: 200d11d188e2e78cea3ad319964f6142b6384865
   react-native-video: 1574074179ecaf6a9dd067116c8f31bf9fec15c8
   RNWatch: a5320c959c75e72845c07985f3e935e58998f1d3
   Yoga: 96b469c5e81ff51b917b92e8c3390642d4ded30c
 
-PODFILE CHECKSUM: 6f4485ed41286517917d47d2170b0de97d32bbfb
+PODFILE CHECKSUM: e830b1b5a46d340e22689b146b55dcf24664c6f1
 
 COCOAPODS: 1.10.1

package-lock.json

         "react-native-iphone-x-helper": "^1.3.1"
       }
     },
+    "react-native-performance": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/react-native-performance/-/react-native-performance-2.0.0.tgz",
+      "integrity": "sha512-jKM9Qg0SkL9D9ad377nxb1VV+OXJSyYyIrBHKmM6CABNxfrLVA5xkQMEibjmZQde7b0ndJOZoQAiObgJjjc4VQ=="
+    },
     "react-native-sound": {
       "version": "github:jitsi/react-native-sound#3fe5480fce935e888d5089d94a191c7c7e3aa190",
       "from": "github:jitsi/react-native-sound#3fe5480fce935e888d5089d94a191c7c7e3aa190"

package.json

     "react-native-immersive": "2.0.0",
     "react-native-keep-awake": "4.0.0",
     "react-native-paper": "4.8.1",
+    "react-native-performance": "2.0.0",
     "react-native-sound": "github:jitsi/react-native-sound#3fe5480fce935e888d5089d94a191c7c7e3aa190",
     "react-native-splash-screen": "3.2.0",
     "react-native-svg": "12.1.0",

react/features/mobile/polyfills/browser.js

     // WebRTC
     require('./webrtc');
 
+    // Performance API
+
+    // RN 0.61 does not provide performance.now(), and react-native-performance
+    // requires it.
+    const now = () => Date.now();
+
+    if (!global.performance) {
+        global.performance = {};
+    }
+
+    if (!global.performance.now) {
+        global.performance.now = now;
+    }
+
+    const perf = require('react-native-performance');
+
+    global.performance = perf;
+    global.PerformanceObserver = perf.PerformanceObserver;
+
     // CallStats
     //
     // Required by: