Audio not rerouted to Android Auto

[mbpictures]

Android version(s): Android 16
Android device(s): S25+
Oboe version: 1.10.0
App name used for testing: hello-oboe

Short description
Audio not rerouted to Android Auto after connecting.

Steps to reproduce

1. Connect the smartphone to the PC
2. Install hello-oboe
3. Start Android Auto Dev Server
4. Forward tcp:5277 with adb
5. Start hello oboe and play sound (e.g. hold finger)
6. Start DesktopHeadUnit (using ANDROID_SDK/extras/google/auto/desktop-head-unit)

Expected behavior
Audio is correctly rerouted to the Android Auto Head Unit.

Actual behavior
Audio is still being played through the phone speakers.

Device
Samsung Galaxy S25+

Please list which devices have this bug.
If device specific, and you are on Linux or a Macintosh, connect the device and please share the result for the following script. This gets properties of the device.

for p in \
    ro.product.brand ro.product.manufacturer ro.product.model \
    ro.product.device ro.product.cpu.abi ro.build.description \
    ro.hardware ro.hardware.chipname ro.arch "| grep aaudio";
    do echo "$p = $(adb shell getprop $p)"; done

Any additional context

If applicable, please attach a few seconds of an uncompressed recording of the sound in a WAV or AIFF file.