Revert "[CTT-5] Stop update TCP conntrack entry timeout"

This reverts commit a5c742be69c9a5e786b5fd6af60d84598196ae9a.

Reason for revert:
Stop releasing this commit because it needs more test coverage.

Bug: 190783768
Bug: 192804833
Change-Id: I6e6b40b0f6207ed197d01bfabb616f1afa31fb70
Test: atest TetheringCoverageTests
2 files changed