Updating Bluetooth stack fuzzer configurations

This change adds the following default fuzzer settings:
1. Disable debug output for performance
2. Reducing the max corpus size to 4KB (default is 1MB)

Ignore-AOSP-First: Internal fuzzers
Test: Manual build and test
Bug: 274525374
Change-Id: I0a87bdb46bb5205dd112538e6b70954ea4c08f3b