Skip polling when light doze mode is enabled

This is needed as short-term solution to reduce false alarms
in light doze mode, because the mid-term solution which requires
API cannot meet SDK extension API freeze timeframe.

This change also removes switch case with arrows syntax since it
crashes lint check script.

Test: atest TcpSocketTrackerTest
Test: m lint-check
Test: Manual check with adb commands that enable light doze mode
Bug: 297836825
Change-Id: Ibe22be6249748538fb177769049d5876d5ea005d