Use correct context for Screen Record Dialog

The dialog was using the status bar context, which caused rendering issues when launched from the shade on an external display (the specified window type 2017 is not valid)

It now uses shadeDialogContextInteractor to ensure the correct context is always used. ( a DIALOG_WINDOW_TYPE context)

Bug: 422987559
Flag: com.android.systemui.shade_window_goes_around
Test: Open screen record on external display
Change-Id: I8ffc7a6776d737362093dbf7274c5cde3428a881