hwc2: Fix the single-buffer layer use case

In single-buffer layer use-case, SF needs to process the Refresh
callback between Validate and Commit Phase. Hence, HWC HAL cannot
skip the Validate Phase of SF with Skip/Internal Validate feature.

CRs-Fixed: 2367832
Change-Id: I044c4ffbfded60c1d807c6dd0202c199e757c065
2 files changed