Fix split cannot active if app trampoline launch new task

This reverts commit 2a47e6a6ed4d5fdc812e9c1ce3f60b5ff226f31c and
commit 76ab53a384b16fbf07ffd4c11952ef687bd9bcc3.

Both CL cause regression which lead to users cannot active split
by some apps use trampoline launch new task on launcher icon. So
fix it by revert both CLs.

Other changes are also for fixing this case. There is a timing
issue and we cannot ensure the old trampoline still remain under
split root when we get remote animation callback. Fix it by only
checking any children tasks are under split root or not.

Bug: 278172065
Test: manual
Test: pass existing tests
Change-Id: Ibd6d9a8377e4b5327a473f8b9adf4e569e826172

0 files changed, 0 insertions, 0 deletions