- Increase the default cache file size to 5MB
- Recommended a minimum cache file size of 2MB to discourage
applications from specifying values small enough such that
unreasonably large numbers of cache files are generated
- Allow maxCacheFileSize=C.LENGTH_UNSET, equivalent to setting it
to MAX_VALUE. This is just for API consistency with other APIs
we have that accept LENGTH_UNSET
Issue: #4253
PiperOrigin-RevId: 227524233
