Add a kconfig check for CONFIG_ANDROID_BINDER_IPC_SELFTEST not Y

I was trying Waydroid some days ago on Alpine and Pmos devices (desktop and PinephonePro), and discovered we still suffer the "it take an eternity to start" issue.

Looking at the Waydroid issues I discovered it was probably related to the fact the binder IPC selftest was enabled.

https://github.com/waydroid/waydroid/issues/730

I tried to remove it, and it seems to help Waydroid to start decently. I then talked with Alice, and so we dropped this from Alpine.

https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/45277

Now I was back on Pmos devices and discovered we also have this value still enabled, at least on Pinephone.

@craftyguy then recommended for me to open this ticket here, cause we should add a check of the kconfig values, to fix this in a durable way.