Add fuzzer for the mainline supplicant service.

Bug: 365585450
Test: m mainline_supplicant_service_fuzzer \
       && adb sync data \
       && adb shell /data/fuzz/arm64/\
           mainline_supplicant_service_fuzzer/\
           mainline_supplicant_service_fuzzer
Change-Id: Ibb257c0a83c033804fd1c727019beb45592ea7fb
3 files changed