NetworkStats: apply464xlatAdjustments - don't remove CLAT_UID

This should no longer be needed after all the cleanups.

Test: atest NetworkStatsTest NetworkStatsFactoryTest
Bug: 150738490
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I289d935f84b616ed857ef4c5a7427d57c282d00c