Switch off `enableOnBackInvokedCallback` until https://issuetracker.google.com/issues/271303558 is fixed. Fixes https://github.com/vector-im/element-x-android/issues/1461
Switch off `enableOnBackInvokedCallback` until https://issuetracker.google.com/issues/271303558 is fixed. Fixes https://github.com/vector-im/element-x-android/issues/1461