servicemanager : Adding clear API to ServiceManager

Adding an API to clear members of ServiceManager. Using it in
ServiceManagerFuzzer to avoid indirect leaks.

BUG: 240481296
Test: m servicemanager_fuzzer && $ANDROID_HOST_OUT/fuzz/x86_64/servicemanager_fuzzer/servicemanager_fuzzer
Change-Id: Ifda8d81981a1143e08c80436ac80d74fcbe14318
3 files changed