Add isTetheringFeatureEnabled which use tethering namespace

This is no-op change. Tethering shouldn't use connectivity namespace
because it already be used for NetworkStack module. The new feature
should check isTetheringFeatureEnabled instead.

Bug: 238274852
Test: atest TetheringTests
Change-Id: I009f654d0bf8df7051b822e666e3206dd70a5523
2 files changed