Support stable ids in chip adapters

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/chips/EncryptRecipientChipsInput.java

@@ -40,6 +40,11 @@ public class EncryptRecipientChipsInput extends ChipsInput<EncryptRecipientChip>
             this.keyInfo = keyInfo;
         }
 
+        @Override
+        public long getId() {
+            return keyInfo.master_key_id();
+        }
+
         @Override
         public boolean isKeptForConstraint(CharSequence constraint) {
             return keyInfo.uidSearchString().contains(constraint);