Replace Bundle used in IWindowSession#relayout

1. Passing Parcelable in Bundle through AIDL can cause some unexpected
   exception (b/335444562)
2. Introduce WindowRelayoutResult so that if we need to add more optional
   fields in the future, we don't need to change the function signature.

Bug: 335601427
Bug: 335444562
Test: atest WmTests:WindowManagerServiceTests
Flag: com.android.window.flags.window_session_relayout_info
Change-Id: I291cdca2e1f730e5a1246409edc21d60f78e07ca