Move setScanMode to legacy HAL

Cherry-pick from https://partner-android-review.git.corp.google.com/c/platform/hardware/interfaces/+/2369946
Implementation of setScanMode is platform-specific. It's more reasonable to move it the legacy HAL like other platform-specific APIs.

Bug: 265866990
Test: manual Test
Test: VTS
Change-Id: I2f8ff73b764ed1b9835b8e3157f673d7d558ae02
4 files changed