Specify display ID while calling getNavBarPosition()

Navigation bar can show on non-default display now. So the caller
should specify which display the desired navigation bar is on.

Bug: 117474929
Test: atest Launcher3Tests
Change-Id: Ibb22e51730ab145a42a129b4d964299acd4efd56
(cherry picked from commit f1bb3a4d4c9a1c6ba5cff5550b6d6b2b84ff272f)
1 file changed