Use consistent package naming

tests/react-test-app/android/app/build.gradle

@@ -55,7 +55,7 @@ android {
     buildToolsVersion "23.0.1"
 
     defaultConfig {
-        applicationId "io.realm.reactnative.testapp"
+        applicationId "io.realm.react.testapp"
         minSdkVersion 16
         targetSdkVersion 22
         versionCode 1

tests/react-test-app/android/app/src/main/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="io.realm.reactnative.testapp">
+    package="io.realm.react.testapp">
 
     <uses-permission android:name="android.permission.INTERNET" />
 

tests/react-test-app/android/app/src/main/java/MainActivity.java

@@ -1,4 +1,4 @@
-package io.realm.reactnative.testapp;
+package io.realm.react.testapp;
 
 import android.app.Activity;
 import android.os.Bundle;