Delete (most) sf fuzzers

The remaining fuzzer works at the AIDL service level, which is under development + evaluation.

The rest of the fuzzers don't operate at the right interface to meaningfully catch security issues, and are a maintenance cost.

Bug: 325656219
Change-Id: I7ec9b41ff561ab3f0e7d48a93a9b6bb57caffe50
Test: builds
10 files changed