Updated testnet ud contact and certificate

.gitignore

@@ -85,3 +85,7 @@ app/src/main/res/raw/ud_contact_test.bin
 app/src/main/res/raw/ud_elixxir_io.crt
 
 fastlane/Fastfile
+
+app/src/main/res/raw/ud_testnet_contact.bin
+
+app/src/main/res/raw/ud_testnet.crt

app/src/main/java/io/xxlabs/messenger/bindings/wrapper/bindings/BindingsWrapperBindings.kt

@@ -131,23 +131,32 @@ class BindingsWrapperBindings {
 
         private fun UserDiscoveryWrapperBindings.onUdInitialized() {
             XxMessengerApplication.isUserDiscoveryRunning = true
-            development(BuildConfig.DEBUG || BuildConfig.ENVIRONMENT == Environment.TEST_NET)
+            when {
+                BuildConfig.ENVIRONMENT == Environment.TEST_NET -> testNet()
+                BuildConfig.DEBUG -> development()
+                else -> normal()
             }
 
-        private fun UserDiscoveryWrapperBindings.development(enabled: Boolean) {
-            if (enabled) {
+        }
+
+        private fun UserDiscoveryWrapperBindings.development() {
             setAlternativeUD(
-                    if (BuildConfig.ENVIRONMENT == Environment.TEST_NET) {
-                        testNetUserDiscoveryIp
-                    } else {
-                        devUserDiscoveryIp
-                    } ,
+                devUserDiscoveryIp,
                 rawBytes(R.raw.ud_elixxir_io),
                 rawBytes(R.raw.ud_contact_test)
             )
-            } else {
-                restoreNormalUD()
         }
+
+        private fun UserDiscoveryWrapperBindings.testNet() {
+            setAlternativeUD(
+                testNetUserDiscoveryIp,
+                rawBytes(R.raw.ud_testnet),
+                rawBytes(R.raw.ud_testnet_contact)
+            )
+        }
+
+        private fun UserDiscoveryWrapperBindings.normal() {
+            restoreNormalUD()
         }
 
         private fun rawBytes(resourceId: Int): ByteArray {