/etc/compizconfig/upgrades/com.canonical.unity.unity.03.upgrade is in unity-common 5.10.0-0ubuntu6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [unityshell]
+s0_alt_tab_bias_viewport = true
+s0_launcher_hide_mode = 0
|