Update androidx dependencies doc

Changes:
Gradle version changed from 9.5.1 to 9.6.1 on 06-26-2026
Gradle version in androidx changed from 9.5.0 to 9.6.0
AGP version changed from 9.2.1 to 9.3.1 on 07-23-2026
AGP version in androidx changed from 9.3.0-alpha05 to 9.4.0-alpha05
KGP version changed from 2.3.21 to 2.4.10 on 07-14-2026

This CL was automatically created by a cron job.

PiperOrigin-RevId: 953412280
Change-Id: I89a83cd022a0808fe5fbb99b1a7ab6ff39789a41