Nits fix and comment update
Fix some nits from previous CLs and update the comments about the TrafficController locking design Bug: 130334320 Bug: 126620214 Test: Build Change-Id: I9963f1c7944bdd6a759ccc45117aa88720ce6b9f Merged-In: I9963f1c7944bdd6a759ccc45117aa88720ce6b9f (cherry picked from commit fd88f9d6)
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