fix(fullscreen border): Watch rotation and hide the border before rotation

To avoid weird border shape/flicker when the device is rotating, we hide the border when the display is about to rotate, and reshow the border after a delay.

Bug: 341029333
Test: manual. Attach video to the bug
      atest FullscreenMagnificationControllerTest
      atest MagnificationTest
      atest IMagnificationConnectionTest
Flag: com.android.window.flags.always_draw_magnification_fullscreen_border
Change-Id: I06a12a306f22134768e47fe9c2e4dd7a8af83fc7