Modify TaskSystemShortcut.SplitScreen for API change.

Using View#getDisplay().getDisplayId() into
IWindowManager.overridePendingAppTransitionMultiThumbFuture()
for multi-display support.

Bug: 119530958
Test: manual
Change-Id: Icde73b2545f879771a62030c8151a86a324fa593
(cherry picked from commit 233622d907e3c250abd25c3a616f360809850683)
1 file changed