Allow composer to read panel_idle_handle_exit sysfs node

Change panel_idle_exit_handle selinux type to sysfs_display to allow
composer to access it.

Bug: 202182467
Test: ls -Z to check selinux type
Test: composer can access it in enforce mode
Change-Id: I5ca811f9500dc452fe6832dd772376da51f675a8
1 file changed