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

This reverts commit 625dd56a45bfe95c5f1baa1891529503ff3374a9.

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: I998bea04788d58ba6bad71c1691d5a3b33190c1b
Merged-In: I98b2dfd750be57a15785808e2d5723616e2ce20a
12 files changed