[flexiglass] Remove temporary behavior for opening shade scene with remote input

Changed the way touch input from the status bar is piped into flexiglass, so that SceneInteractor no longer holds the remote input state. This also removes the need for us to have our own data model for remote input. Various temporary behaviors predating the dynamics framework were also removed.

Bug: 291965119
Test: Verified remote input from launcher and status bar both drive the scene transition progress correctly.
Change-Id: Iac711cb03c73bb1f32784de34c49d4052027c072