Workaround regression in multiwindow mode change callback

- Revert to O behaviour of sending same MW mode as PIP mode when updated

Bug: 112198479
Test: atest android.app.cts.TaskDescriptionTest
Change-Id: I31387b5dfb2b3f4e8f82b2ba2c26b1672fc77272
(cherry picked from commit 059955f992d77062058d25b9280b14eae5b0bdde)
1 file changed