Add a Swappy installation script for easier Android builds

Run `python misc/scripts/install_swappy_android.py` and Swappy
libraries will automatically be installed to the correct location.

Run the script again when needed to update to the latest version.

misc/scripts/install_swappy_android.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+
+import os
+import shutil
+import sys
+import tempfile
+import urllib.request
+from zipfile import ZipFile
+
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), "../../"))
+
+from misc.utility.color import Ansi, color_print
+
+# Swappy
+# Check for latest version: https://github.com/godotengine/godot-swappy/releases/latest
+swappy_tag = "from-source-2025-01-31"
+swappy_filename = "godot-swappy.zip"
+swappy_folder = "thirdparty/swappy-frame-pacing"
+swappy_archs = [
+    "arm64-v8a",
+    "armeabi-v7a",
+    "x86",
+    "x86_64",
+]
+
+swappy_archive_destination = os.path.join(tempfile.gettempdir(), swappy_filename)
+
+if os.path.isfile(swappy_archive_destination):
+    os.remove(swappy_archive_destination)
+
+print(f"Downloading Swappy {swappy_tag} ...")
+urllib.request.urlretrieve(
+    f"https://github.com/godotengine/godot-swappy/releases/download/{swappy_tag}/{swappy_filename}",
+    swappy_archive_destination,
+)
+
+for arch in swappy_archs:
+    folder = os.path.join(swappy_folder, arch)
+    if os.path.exists(folder):
+        print(f"Removing existing local Swappy installation in {folder} ...")
+        shutil.rmtree(folder)
+
+print(f"Extracting Swappy {swappy_tag} to {swappy_folder} ...")
+with ZipFile(swappy_archive_destination, "r") as zip_file:
+    for arch in swappy_archs:
+        zip_file.getinfo(f"{arch}/libswappy_static.a").filename = os.path.join(
+            swappy_folder, f"{arch}/libswappy_static.a"
+        )
+        zip_file.extract(f"{arch}/libswappy_static.a")
+os.remove(swappy_archive_destination)
+print("Swappy installed successfully.\n")
+
+# Complete message
+color_print(f'{Ansi.GREEN}Swappy was installed to "{swappy_folder}" successfully!')
+color_print(
+    f'{Ansi.GREEN}You can now build Godot with Swappy support enabled by running "scons platform=android swappy=yes".'
+)