chore: rename Bill Playground to Creator

Signed-off-by: Brandon McAnsh <git@bmcreations.dev>

Author: bmc08gt

apps/flipcash/core/src/main/res/values/strings.xml

@@ -427,7 +427,7 @@
     <string name="title_noTransactionHistory">No Activity</string>
     <string name="description_noTransactionHistory">Your recent activity will appear here when you send or receive money</string>
 
-    <string name="title_billCustomizer">Bill Playground</string>
+    <string name="title_billCustomizer">Bill Creator</string>
 
     <string name="error_title_CashReturnedToWallet">Something Went Wrong</string>
     <string name="error_description_CashReturnedToWallet">The cash was returned to your wallet</string>