Add tetheroffload HAL APEX am: d254e37e32 am: 3c7f6052ef

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2749882

Change-Id: I52c627251ceb8f62b57ef867d2f045a0ec3d63f8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>