Add tetheroffload HAL APEX am: d254e37e32 am: 3c7f6052ef am: 45041478bc am: 7ae3afc529

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

Change-Id: I0d70ef5e0167575fa60d37c242d2b72c24075f6d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>