Add Amazon IAP library

app/build.gradle

@@ -185,6 +185,7 @@ dependencies {
     googleplayImplementation "com.google.android.gms:play-services-auth:16.0.1"
     googleplayImplementation 'com.google.android.libraries.places:places:1.1.0'
 
+    amazonImplementation fileTree(dir: 'libs', include: ['*.jar'])
     amazonImplementation "com.crashlytics.sdk.android:crashlytics:${CRASHLYTICS_VERSION}"
     amazonImplementation "com.google.firebase:firebase-core:${FIREBASE_VERSION}"
 

app/src/amazon/AndroidManifest.xml

@@ -1,7 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest
+  xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:tools="http://schemas.android.com/tools"
   package="org.tasks">
 
-  <application/>
+  <application tools:ignore="GoogleAppIndexingWarning">
+    <receiver
+      android:name="com.amazon.device.iap.ResponseReceiver"
+      android:permission="com.amazon.inapp.purchasing.Permission.NOTIFY">
+      <intent-filter>
+        <action android:name="com.amazon.inapp.purchasing.NOTIFY"/>
+      </intent-filter>
+    </receiver>
+  </application>
 
 </manifest>