[vi] Restore high Z-index for shared buffer layer to fix keyboard overlay display (#3787)

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3787
Reviewed-by: Maufeat <sahyno1996@gmail.com>
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Co-authored-by: PavelBARABANOV <pavelbarabanov94@gmail.com>
Co-committed-by: PavelBARABANOV <pavelbarabanov94@gmail.com>

src/core/hle/service/vi/shared_buffer_manager.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
@@ -373,6 +373,8 @@ Result SharedBufferManager::PresentSharedFrameBuffer(android::Fence fence,
                  android::Status::NoError,
              VI::ResultOperationFailed);
 
+    (void)m_container.SetLayerZIndex(layer_id, 100000);
+
     // We succeeded.
     R_SUCCEED();
 }