Fix window movement animations.

Surface insets/parent calculation wasn't used when calculating
the positions for movement animations.

Test: go/wm-smoke
Test: Go to Wifi setting, click on a WIFI with pw, open/close IME
to observe window movement animation.
Bug: 64674361

Change-Id: Iffd98d8f946c2fc2dcb5adb176bb890d8a3fc374