Inject the OpenXR compatibility layer into VR APKs on install

VR apps with an arm64 OpenXR loader get frame/openxr-compat's layer unless
--no-xr-compat; the app bundle ships the layer. Verified on the Frame: Wolvic's
Quest build gets through OpenXR start-up, Open Brush still reaches FOCUSED.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

app/package.json

@@ -64,6 +64,14 @@
           "*.py"
         ]
       },
+      {
+        "from": "../frame/openxr-compat",
+        "to": "frame/openxr-compat",
+        "filter": [
+          "XrApiLayer_FRAME_compat.json",
+          "prebuilt/**/*.so"
+        ]
+      },
       {
         "from": "../frame/devkit-utils",
         "to": "frame/devkit-utils",