android 12 specifying mutability flag

in https://developer.android.com/codelabs/activity-recognition-transition#5
you should not pass 0 for the flags rather the pending intent needs tp specify the mutability flag.
mActivityTransitionsPendingIntent =
PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);

Start with the linked activity-recognition codelab step and the PendingIntent.getBroadcast call shown in the issue. Check the Android 12 PendingIntent mutability requirement, then update the flags so the codelab no longer passes 0.

Written by the indexing model from the issue text.