Merge "remove init_shell"

init_shell.te

-# Restricted domain for shell processes spawned by init.
-# Normally these are shell commands or scripts invoked via sh
-# from an init*.rc file.  No service should ever run in this domain.
-type init_shell, domain;
-domain_auto_trans(init, shell_exec, init_shell)
-permissive_or_unconfined(init_shell)
-
-# Run helpers from / or /system without changing domain.
-allow init_shell rootfs:file execute_no_trans;
-allow init_shell system_file:file execute_no_trans;