Add isAtLeast25Q2() method to NetworkStackUtils for APF offload control

Introduced the isAtLeast25Q2() method in NetworkStackUtils.java to
determine if the Android version is at least 25Q2 (Android 16). This
method will be used in future changes to enable APF mDNS/Ping/IGMP
offloads by default on Android 16 and later versions.

Test: TH
Change-Id: I4cb0329a59990ffe64d4d3b7f83f8e05ffabaea9