Make media projection permission dialog configurable

This CL introduces the new config_mediaProjectPermissionDialogComponent
symbol to specify the dialog component of media project permission
dialog. With this CL, IoT devices will be able to use the other dialog
in the IoT system UI app instead of the default dialog in the system UI
app.

Bug: 65864256
Test: android.view.cts.SurfaceViewSyncTest
Change-Id: I0684372757a00ddf173fc16e4a29f1e181cc1e8f