Ensure splash screen removed after it's view is shown in render thread.

For the client rendering, there is no guarantee the frame is draw
complete when next traversal start. Hide and remove splash screen
window after the frame was commit in render thread.

Flag: com.android.window.flags.use_rt_frame_callback_for_splash_screen_transfer
Bug: 387231234
Test: run test 10+ times on emulator.
Change-Id: I338f6bf263d132c221ce575b9bd526e4662df1b8