Establish native Linux ARM64 Android CI and verification gates (#94)

.gitea/scripts/native-arm64/aapt2

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+"""Adapt AGP's map argument to the pinned native ARM64 AAPT2 syntax."""
+import os
+from pathlib import Path
+import sys
+
+
+def arguments(args):
+    result = []
+    for arg in args:
+        if arg.startswith("--resource-path-shortening-map="):
+            option, value = arg.split("=", 1)
+            result.extend((option, value))
+        else:
+            result.append(arg)
+    return result
+
+
+if __name__ == "__main__":
+    binary = Path(os.environ["ANDROID_HOME"]) / "native-arm64/build-tools/aapt2"
+    os.execv(binary, [str(binary), *arguments(sys.argv[1:])])