[automerger skipped] [RESTRICT AUTOMERGE] Revert "Removed IWLAN legacy mode...

[automerger skipped] [RESTRICT AUTOMERGE] Revert "Removed IWLAN legacy mode support" am: 70c62bf1 am: caffe209 am: 3ecb68ff -s ours am: 02b551c8 -s ours am: db520296 -s ours

am skip reason: subject contains skip directive

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/2510796



Change-Id: I63254ea94c235a01b8915063aba0db833a95944f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>