Revert "Replace TetheringRequestParcel with TetheringRequest"

This reverts commit 3e65131ba387c398dfa82549a0d5a1c6b7b6dcd0.

Reason for revert: breaking CTS 15 R2 -- the change was automerged into android15-tests-dev by accident as it is not actually part of Android 15

Bug: 386722911
Test: presubmit

Change-Id: I97d84084e84c777e8f4e65409e7711206976d63e
Merged-In: I0cdee597d393e53feb9fe9aff4d6c67330c88599
9 files changed