Add note on why lexicographic evaluation works for RYW tokens

Motivation: add clarity on why the method maxOrNull (which uses lexicographic evaulation for strings) works for this use case.

Author: Rodrigo Gomez Palacio

OneSignalSDK/onesignal/core/src/main/java/com/onesignal/common/consistency/IamFetchReadyCondition.kt

@@ -36,7 +36,10 @@ class IamFetchReadyCondition(
     override fun getRywData(indexedTokens: Map<String, Map<IConsistencyKeyEnum, RywData?>>): RywData? {
         val tokenMap = indexedTokens[key] ?: return null
 
-        // Collect non-null RywData objects and find the one with the largest rywToken lexicographically
+        /**
+         * Collect non-null RywData objects and find the one with the largest rywToken lexicographically
+         * Note: this works because RYW tokens are always the same length
+         */
         return listOfNotNull(
             tokenMap[IamFetchRywTokenKey.USER],
             tokenMap[IamFetchRywTokenKey.SUBSCRIPTION],