SF: add PhysicalDisplayId to DisplayMode

A DisplayMode should include the PhysicalDisplayId it
belongs to we could use that to know which display the
mode belogs to.

Change-Id: I781cf30c5ccf886f061a45073b369b4f04cc9140
Bug: 187539899
Test: SF unit tests
Test: refresh rate switching is working on device with
more than one display

Change-Id: I9c73b43384cbe934f7584695e5fe5c53ab402bfb
Merged-In: I9c73b43384cbe934f7584695e5fe5c53ab402bfb