Avoid unnecessary reloads.

briar-android/src/main/java/org/briarproject/briar/android/contact/add/remote/AddContactViewModel.java

@@ -56,7 +56,7 @@ public class AddContactViewModel extends AndroidViewModel {
 	}
 
 	void onCreate() {
-		loadHandshakeLink();
+		if (handshakeLink.getValue() == null) loadHandshakeLink();
 	}
 
 	private void loadHandshakeLink() {

briar-android/src/main/java/org/briarproject/briar/android/contact/add/remote/PendingContactListViewModel.java

@@ -64,7 +64,7 @@ public class PendingContactListViewModel extends AndroidViewModel
 	}
 
 	void onCreate() {
-		loadPendingContacts();
+		if (pendingContacts.getValue() == null) loadPendingContacts();
 	}
 
 	@Override