Rename setUidForeground to noteUidForeground

This patch addresses API review about the naming of
NetworkStatsManager#setUidForeground and it would be
more appropriate to rename it to noteUidForeground.

Bug: 222291301
Test: atest FrameworksNetTests
Change-Id: I952762872850889609c9808aa6e3cdfc04317806
4 files changed