Merge "Make a copy of the TaskFragmentContainer list." into main am: c876ccc7fa

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3249678

Change-Id: I73d60a2b436bc5cf6e3ed18742b4745b8fa42087
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>