Add web and macos, update android and ios (#223)

jsonexample/android/app/build.gradle

@@ -38,7 +38,7 @@ android {
 
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId "dev.flutter.example.jsonexample"
+        applicationId "dev.flutter.jsonexample"
         minSdkVersion 16
         targetSdkVersion 28
         versionCode flutterVersionCode.toInteger()

jsonexample/android/app/src/debug/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="dev.flutter.example.jsonexample">
+    package="dev.flutter.jsonexample">
     <!-- Flutter needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.
     -->

jsonexample/android/app/src/main/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="dev.flutter.example.jsonexample">
+    package="dev.flutter.jsonexample">
     <!-- io.flutter.app.FlutterApplication is an android.app.Application that
          calls FlutterMain.startInitialization(this); in its onCreate method.
          In most cases you can leave this as-is, but you if you want to provide

jsonexample/android/app/src/main/kotlin/dev/flutter/jsonexample/MainActivity.kt

@@ -1,4 +1,4 @@
-package dev.flutter.example.jsonexample
+package dev.flutter.jsonexample
 
 import androidx.annotation.NonNull;
 import io.flutter.embedding.android.FlutterActivity

jsonexample/android/app/src/profile/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="dev.flutter.example.jsonexample">
+    package="dev.flutter.jsonexample">
     <!-- Flutter needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.
     -->