Removing ScreenRecordRule from MediaProjection desktop mode tests

These tests have had major performance regressions - possible cause is the addition of these screen record rule. These tests already attempt to set up a virtual display and record a screen, so attempting to record over that might be causing some unexpected behaviours which is causing regressions.

Bug: 407784029
Test: changed tests
Flag: EXEMPT refactor
Change-Id: I90efdfd85ee7eca562ab462f0b891327c5825eaf