Fix new player-is-x mixins

- Call the real method from isFriended
- Call the real method from isIgnored
- Add null check for getClanMembers

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

runelite-api/src/main/java/net/runelite/api/Client.java

@@ -162,7 +162,7 @@ public interface Client
 
 	IndexedSprite createIndexedSprite();
 
-	boolean isFriend(String name, boolean mustBeLoggedIn);
+	boolean isFriended(String name, boolean mustBeLoggedIn);
 
 	boolean isIgnored(String name);