agdktunnel: screen remains black after task switch

When I run the AGDKtunnel example on any of my samsung devices (S24, A52 or tab A7 lite), the screen remains completely black after a task switch. This is 100% reproducible.

NOTE: to workaround https://github.com/android/games-samples/issues/80, I have run the AGP auto-upgrade to now use gradle 8.7.3

[logcat_output_s24.txt](https://github.com/user-attachments/files/18076140/logcat_output_s24.txt)

Start by reproducing the black screen in the AGDKtunnel example on a Samsung device, then inspect logcat_output_s24.txt alongside the task-switch flow. Done means the example resumes with a visible screen after switching tasks on the affected devices.

Written by the indexing model from the issue text.