[DO NOT MERGE] Move device config high_refresh_rate_blacklist to display_manager

high_refresh_rate_blacklist belongs to smooth display feature. Move the
key from namespace window_manager to display_manager.

Bug: 139138964
Test: atest WmTests:HighRefreshRateBlacklistTest
Test: Manual adb shell device_config/dumpsys window
Change-Id: I3ae8ecce80ef97c4683a1c18ad81dc78456e9d57