enable btf for offload.o & test.o am: 07d3013b0d am: 546a507a94 am: d83cebdb89

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2089289

Change-Id: I47cc0ac3d887c71fdc8e9e589ba21addd2ade4a8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>