Correct lossless compression target

The previous change 6b45e555 mistakenly applied lossless compression to
low-resolution snapshots. This fix ensures that compression is
correctly applied to high-resolution snapshots as intended.

Flag: com.android.window.flags.respect_requested_task_snapshot_resolution
Bug: 438072503
Test: nexus_image_test_platform
Change-Id: Ie10e519a7a2ec844ba5b82bea139a5d53b3c89ea