Refactored avrcp_device_fuzz

The following are updates to the fuzzer:
1. Added new APIs and randomized API calls.
2. Coverage improved from 44% to 75%.
3. Resolved assertion failure observed in b/333482486

Test: m avrcp_device_fuzz
exec/s: 1900
Bug: 348101091

Change-Id: I6bf0af1c526a2228d6d6652af31c170d0394ee47