Fix: Removed isValidCondition from CreateUserContext (#367)

Author: mnoman09

android-sdk/src/main/java/com/optimizely/ab/android/sdk/OptimizelyClient.java

@@ -794,7 +794,7 @@ public OptimizelyConfig getOptimizelyConfig() {
     @Nullable
     public OptimizelyUserContext createUserContext(@NonNull String userId,
                                                    @NonNull Map<String, Object> attributes) {
-        if (isValid()) {
+        if (optimizely != null) {
             return optimizely.createUserContext(userId, attributes);
         } else {
             logger.warn("Optimizely is not initialized, could not create a user context");