Add assetlinks.json file for TWA (#1734)

Author: laineyhm

src/.well-known/assetlinks.json

@@ -0,0 +1,12 @@
+[
+  {
+    "relation": ["delegate_permission/common.handle_all_urls"],
+    "target": {
+      "namespace": "android_app",
+      "package_name": "org.sil.languageforgeweb",
+      "sha256_cert_fingerprints": [
+        "EF:CF:30:DB:7E:C8:D2:34:F2:34:59:21:9E:51:F7:05:F6:EC:B2:11:DA:B9:B6:74:79:1F:F1:BB:5E:C8:68:C8"
+      ]
+    }
+  }
+]