[SP21] Address comments for API council review about aosp/1172143

Test: atest FrameworksNetTests ImsPhoneCallTrackerTest
Test: atest TetheringTests NetworkStackTests
Test: m doc-comment-check-docs
Fix: 148552904

Change-Id: I141393f229e772d2eb9f7c156849e379bd71b845
Merged-In: I141393f229e772d2eb9f7c156849e379bd71b845
(cherry picked from aosp/1253717)
14 files changed