Introduce VibrationConfig.Builder

Create builder to help tests with custom vibration config values.
Use new builder in tests, instead of mocks, to run agains the real
implementation.

Fix: 429190078
Bug: 427503922
Test: FrameworksVibratorServicesTests
Flag: EXEMPT small refactor + test only changes
Change-Id: I3527cd429ca41698352588d50b86ac1c439b5733