Use fuzz_config to config fuzzing size

Do not hard code the size in the source code.
Use fuzz_config in Android.bp to do that.

Test: atest servicemanager_test
Bug: 232439428
Bug: 240318902
Change-Id: I03c186bc6eed60f1368bfcb9e0a21dbd5c4c1c11
2 files changed