Graphics: Migrate graphics.common HAL to version 6

- Update defaults to V6 instead of V5
- Update older dependent HALs to also reference V6

Test: Builds
Flag: EXEMPT build change
Bug: 368395888
Change-Id: I542c1c638b9d63c2510b11d04d6ed98477780af7
Merged-In: I542c1c638b9d63c2510b11d04d6ed98477780af7