Adding defaults for AIDL rust fuzzers

Adding rust_defaults for service fuzzers and
using them in existing fuzzers.

Test: m parcel_fuzzer_rs && adb sync data && adb shell data/fuzz/x86_64/parcel_fuzzer_rs/parcel_fuzzer_rs
Bug: 261555016
Change-Id: I7b0a675e404dd49bf775d34c6900d22fbcd951be
2 files changed