Update data type and comments on tagSocket/untagSocket APIs

- Fix comment in version script to say LL-NDK, not NDK
- Use uint32_t for tag

Bug: 223423155
Test: CtsNetTestCases:android.net.TrafficStatsTest
Test: CtsNativeNetPlatformTestCases
Change-Id: Ifb819ed0adeb8f173b98c3f131a4bf2e0715dd4e