Update Shark for newer Okio and Kotlin compliance

[roberto-git0]

Updates the shark modules to use Okio2 and addresses newer Kotlin issues.

1. Okio Compliance Updated the code to align with the Okio 2.x API changes:
   a) Extension Functions: Replaced static calls like Okio.buffer() and Okio.source() with their extension function counterparts (.buffer(), .source())
   b) Properties: Migrated from getter-style functions to Kotlin properties where applicable (e.g., buffer.size instead of buffer.size())

2. Kotlin Compliance Addressed issues:
   a) String Casing: Replaced deprecated toLowerCase()/toUpperCase() with lowercase()/uppercase() to ensure consistent behavior across platforms.

[CLAassistant]

All committers have signed the CLA.