DisplayModeDirector: separate the display refresh rate and the render frame rate

Add an additional dimension to DisplayModeDirector for render frame rate
in addition to the display physical refresh rate. DisplayModeDirector aggregates the requests for both render frame rates and physical refresh rates, and sets the policy to SurfaceFlinger.
SurfaceFlinger will select the display refresh rate based on the physical refresh rate range, and schedule applications based on the render frame rate range.
This is a change over the previous logic where the render frame rate and
physical refresh rate were always the same for SurfaceFlinger.

Test: atest LocalDisplayAdapterTest DisplayModeDirectorTest
Bug: 241460058
Change-Id: I9563257c7268a731a3919ffa368f7b8ae777eb99