Verify domain with Google (#284)

Needed for deeplinks to work

Author: ByteHamster

.well-known/assetlinks.json

@@ -0,0 +1,14 @@
+[
+  {
+    "relation": [
+      "delegate_permission/common.handle_all_urls"
+    ],
+    "target": {
+      "namespace": "android_app",
+      "package_name": "de.danoeh.antennapod",
+      "sha256_cert_fingerprints": [
+        "A8:54:1B:7E:6C:69:76:B0:B7:E3:A9:0B:E8:9C:63:A6:66:BE:37:3F:1D:BB:ED:A6:71:AC:2E:17:26:5D:6A:0F"
+      ]
+    }
+  }
+]