Disable back gesture in Launcher after reboot

It needs to be ensured that `updateDisallowBack` is called at startup after views are created.

Bug: 318786031
Flag: NONE
Test: Manual, i.e. verifying that back gesture is disabled after rebooting the device
Change-Id: I32812101c0e159f5cba41ab419f86de760449906
1 file changed