Desktop screenshots: Multidisplay support for partial screenshots

Use the ID of the display containing the pre-capture UI in the
screenshot request argument. Ensure that the display ID is honored by
the screenshot executor for screenshot requests from the pre-capture
UI.

Bug: 433792108
Test: atest PreCaptureViewModelTest
Test: atest ScreenshotInteractorTest
Flag: com.android.systemui.desktop_screen_capture
Change-Id: I1a6c05037d9aadc97a343f3e198defa26f868f02