chore(#MagSettingsPanel): adjust magnification settings panel ui when showing...

chore(#MagSettingsPanel): adjust magnification settings panel ui when showing for fullscreen magnifier

When showing WindowMagnificationSettings panel for fullscreen magnifier, the edit button and allow diagonal switch are not effectual. Therefore, we hide these two ui items when showing for fullscreen magnifier.

Bug: 271127581
Test: manually
      atest WindowMagnificationSettingsTest
      atest MagnificationSettingsControllerTest
      atest WindowMagnificationTest
Change-Id: Ib27b0d5cac0b6c705e29e499cabb2399796c91d3