Update mobile builds and chat reveal flow

Co-authored-by: Claude <noreply@anthropic.com>

apps/mobile/app.json

@@ -35,7 +35,8 @@
         "RECEIVE_BOOT_COMPLETED",
         "VIBRATE",
         "android.permission.USE_BIOMETRIC",
-        "android.permission.USE_FINGERPRINT"
+        "android.permission.USE_FINGERPRINT",
+        "com.android.vending.BILLING"
       ]
     },
     "web": {