Fix Android API 31 issues and Convert example to TS (#812)

* convert example to TS

* fix android api 31 issues

Author: DanielEliraz

example/android/build.gradle

@@ -2,21 +2,19 @@
 
 buildscript {
     ext{
-        androidGradlePluginVersion = '4.0.0'
-        androidSdkVersion = 30
+        androidSdkVersion = 31
         androidMinSdkVersion = 21
         kotlinVersion = "1.3.61"
         kotlinStdlib = "kotlin-stdlib-jdk8"
         detoxKotlinVersion = kotlinVersion
-        googleServices = "4.3.3"
   }
     repositories {
         google()
         mavenCentral()
     }
     dependencies {
-        classpath "com.android.tools.build:gradle:$androidGradlePluginVersion"
-        classpath "com.google.gms:google-services:$googleServices"
+        classpath "com.android.tools.build:gradle:4.0.2"
+        classpath "com.google.gms:google-services:4.3.3"
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
     }
 }

example/android/myapplication/build.gradle

@@ -60,6 +60,3 @@ dependencies {
 }
 
 apply plugin: 'com.google.gms.google-services'
-
-apply from: file("../../../node_modules/@react-native-community/cli-platform-android/native_modules.gradle")
-applyNativeModulesAppBuildGradle(project, "../../../")

example/android/myapplication/src/main/AndroidManifest.xml

@@ -15,7 +15,8 @@
 
         <activity
             android:name=".MainActivity"
-            android:label="@string/app_name">
+            android:label="@string/app_name"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
 

example/android/myapplication/src/main/java/com/wix/reactnativenotifications/app/MainActivity.java

@@ -1,9 +1,7 @@
 package com.wix.reactnativenotifications.app;
 
-import android.os.Bundle;
 import com.facebook.react.ReactActivity;
 
-
 public class MainActivity extends ReactActivity {
     @Override
     protected String getMainComponentName() {