Revert "Set cutout mode to shortEdges on flicker"

This reverts commit dd1d5b61.

Reason for revert: This workaround does more harm than good on movable-cutout devices. With edge-to-edge it isn't necessary any more.
Test: SeamlessAppRotationTest
Bug: 398918267
Flag: EXEMPT integration test

Change-Id: Idedf90c39f718fb7cb6db924ea185f291bc8d210