fix: add cached referrer null check

Author: uerceg

Adjust/sdk-core/src/main/java/com/adjust/sdk/ActivityHandler.java

@@ -1553,7 +1553,9 @@ private void processCachedDeeplinkI() {
         }
 
         AdjustDeeplink deeplink = new AdjustDeeplink(Uri.parse(cachedDeeplinkUrl));
-        deeplink.setReferrer(Uri.parse(cachedDeeplinkReferrer));
+        if (cachedDeeplinkReferrer != null) {
+            deeplink.setReferrer(Uri.parse(cachedDeeplinkReferrer));
+        }
         processDeeplink(deeplink, cachedDeeplinkClickTime);
 
         sharedPreferencesManager.removeDeeplink();