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">

mastodon/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+	<base-config>
+		<trust-anchors>
+
+			<certificates src="system" />
+			<certificates src="user" />
+		</trust-anchors>
+	</base-config>
+</network-security-config>