Revert "Fix recent apps in system UI for Skia pipeline"

This reverts commit b33013fb.

Reason for revert: Caused a memory leak, b/38330767
Bug: 38136140
Bug: 38330767
Test: manual, verified memory isn't leaking doing the steps in b/38330767

Change-Id: I98b2dfd750be57a15785808e2d5723616e2ce20a