make a black screen on unity code example

Example: unity black screen

if using arcore

In August 2020, Google Play Services for AR (ARCore) removed support for 32-bit-only apps on 64-bit devices running Android 10 (API level 29) and later. Support for 32-bit-only ARCore enabled apps on 64-bit devices running Android 9 Pie (API level 28) and earlier may be removed without notice in an upcoming ARCore release. 32-bit-only ARCore enabled apps running on 32-bit devices are unaffected and continue to be supported.

If you published a 32-bit-only (e.g., armeabi-v7a) version of your ARCore-enabled app without publishing a corresponding 64-bit (arm64-v8a) version, you must update your app to support 64-bit devices.

32-bit-only ARCore-enabled apps that aren't updated will fail to create an ARCore session and might crash when attempting to start an augmented reality (AR) session on affected 64-bit devices.

Apps published after the Google Play 64-bit requirement went into effect on August 1, 2019, and weren't eligible for an exception, should already be 64-bit compliant