Merge pull request #846 from Evil2000/master

Added network security config

mastodon/src/main/AndroidManifest.xml

@@ -31,6 +31,7 @@
 		android:allowBackup="true"
 		android:label="@string/app_name"
 		android:supportsRtl="true"
+		android:networkSecurityConfig="@xml/network_security_config"
 		android:icon="@mipmap/ic_launcher"
 		android:theme="@style/Theme.Mastodon.AutoLightDark"
 		android:largeHeap="true"