Clean up Split Decor on aborted resizing transition

The Split resizing transition could be aborted, for example, when a foldable device is locked while transitioning between folded and unfolded states. This change cleans up the Split Decor in onTransitionConsumed when the transition is aborted to ensure it's released correctly, preventing leaks.

This fix addresses a bug where the Split Decor would not be cleaned up properly, resulting in a persistent veil overlay.

Bug: 438464320
Flag: EXEMPT bug fix
Test: 1. Unfold a foldable device and pin the taskbar. 2. Split two apps at a 10:90 ratio. 3. Fold the device. 4. Unfold the device and verify that the veil overlay has disappeared. 5. Repeat this process multiple times to ensure the issue is consistently resolved.
Change-Id: I041f8baa9d9036e64cccde08147b6aec793883df