Persist high-resolution snapshots using lossless compression

The lossless compression approach provides more reliable results
against the HumanEyeMatcher comparison method.

Flag: com.android.window.flags.respect_requested_task_snapshot_resolution
Bug: 438072503
Test: nexus_image_test_platform
Change-Id: I9b736d2a444587b20fe8b82464805f568106981c