Allow Reordering of Tasks on Specific Displays

Bug: 402629293

Create a new API method, functionally equivalent to existing method
moveRootTaskToDisplay, but incorporating a boolean parameter onTop.
When onTop is true, the task will be moved to the top of the display's
activity stack. When false, the task will be moved to the bottom. This
allows for precise control over task ordering on designated displays
and also user can potentially resume the app from where it was left off.

Flag: EXEMPT adding hidden api without usage
Signed-off-by: Edwin Varghese <EVARGHE1@ford.com>
(cherry picked from https://android-review.googlesource.com/q/commit:d7a3ec23b6bf80fa2fee1ca7736400ec7306eaa6)
Merged-In: Ib04ada36ed36eb9d9c48b25da9a176234280a81c
Change-Id: Ib04ada36ed36eb9d9c48b25da9a176234280a81c