Fix wrong bounds being used in landscape.

- Ensure we use the right display size when calculating PIP bounds.
- Also update interface to take the display id.

Test: android.server.cts.ActivityManagerPinnedStackTests
Test: #testPinnedStackDefaultBounds
Test: #testPinnedStackMovementBounds

Change-Id: I01fd8ba6dee212c29a9a092673ee8f7843e41af6