The dvfs headroom was split into its own knob. Update to use it. am: d57beb455c am: 690db828aa am: fdf070759e am: 5df7285c37

Original change: https://googleplex-android-review.googlesource.com/c/device/google/lynx/+/23121945

Change-Id: Iee8585ef1c68ad458bd42c9097085da3478f6a6b
Signed-off-by: Automerger Merge Worker <[email protected]>