Refactored vehicleManager_fuzzer

The following are the updates to the fuzzer:
1. Randomised order of API calls using fdp.
2. Enhanced code coverage by 10%.

exec/s: 6
Test: ./vehicleManager_fuzzer
Bug: 302903753

Change-Id: I83f0a4121871d5b08b4f00f40dd096854aee63c5
2 files changed