Pass the max desired hdr/sdr ratio to DisplayManager

SurfaceFlinger already computes this, but DisplayManager needs to use
this for apps that don't want as large of a ratio than the system
supports.

Bug: 267350616
Test: SilkFX test app
Change-Id: I03b6b458e220a9fdc30eb137a7455101d5a8f51a
4 files changed