Remove non-functional IGMPv3 test and flaky APF checks

This commit removes the test_igmpv3_general_query_offload() test
logic. This test fails on user builds because they run on non-rootable
devices, preventing the necessary test operations.

Additionally, the APF counter check logic is removed as it was causing
test flakiness and instability.

Bug: 406570694
Test: TH
Flag: EXEMPT test only change
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:3781d05054d0ea20e4eb64350e6dfd54a917c891)
Merged-In: I9f2f32c49737721e537d578d6df41d4062d0684f
Change-Id: I9f2f32c49737721e537d578d6df41d4062d0684f
2 files changed