cmake: Add option to fetch validation layer binary on android

CMakeLists.txt

@@ -49,6 +49,8 @@ option(YUZU_TESTS "Compile tests" "${BUILD_TESTING}")
 
 option(YUZU_USE_PRECOMPILED_HEADERS "Use precompiled headers" ON)
 
+option(YUZU_DOWNLOAD_ANDROID_VVL "Download validation layer binary for android" ON)
+
 CMAKE_DEPENDENT_OPTION(YUZU_ROOM "Compile LDN room server" ON "NOT ANDROID" OFF)
 
 CMAKE_DEPENDENT_OPTION(YUZU_CRASH_DUMPS "Compile Windows crash dump (Minidump) support" OFF "WIN32" OFF)
@@ -77,6 +79,24 @@ if (ANDROID OR WIN32 OR APPLE)
 endif()
 option(ENABLE_OPENSSL "Enable OpenSSL backend for ISslConnection" ${DEFAULT_ENABLE_OPENSSL})
 
+if (ANDROID AND YUZU_DOWNLOAD_ANDROID_VVL)
+    set(vvl_version "sdk-1.3.261.1")
+    set(vvl_zip_file "${CMAKE_BINARY_DIR}/externals/vvl-android.zip")
+    if (NOT EXISTS "${vvl_zip_file}")
+        # Download and extract validation layer release to externals directory
+        set(vvl_base_url "https://github.com/KhronosGroup/Vulkan-ValidationLayers/releases/download")
+        file(DOWNLOAD "${vvl_base_url}/${vvl_version}/android-binaries-${vvl_version}-android.zip"
+            "${vvl_zip_file}" SHOW_PROGRESS)
+        execute_process(COMMAND ${CMAKE_COMMAND} -E tar xf "${vvl_zip_file}"
+                        WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/externals")
+    endif()
+
+    # Copy the arm64 binary to src/android/app/main/jniLibs
+    set(vvl_lib_path "${CMAKE_CURRENT_SOURCE_DIR}/src/android/app/src/main/jniLibs/arm64-v8a/")
+    file(COPY "${CMAKE_BINARY_DIR}/externals/android-binaries-${vvl_version}/arm64-v8a/libVkLayer_khronos_validation.so"
+            DESTINATION "${vvl_lib_path}")
+endif()
+
 # On Android, fetch and compile libcxx before doing anything else
 if (ANDROID)
     set(CMAKE_SKIP_INSTALL_RULES ON)