ashmem: expand app access

We are only interested in removing "open" access from apps, so leave
apps with (rw_file_perms - open) permissions to /dev/ashmem

Bug: 126627315
Test: emulator boots without denials to /dev/ashmem
Change-Id: I7f03fad5e4e82aebd1b6272e4956b16f86043637
diff --git a/private/untrusted_app_all.te b/private/untrusted_app_all.te
index d06e56a..3c20c08 100644
--- a/private/untrusted_app_all.te
+++ b/private/untrusted_app_all.te
@@ -188,4 +188,4 @@
 
 # Allow access to ashmemd to request /dev/ashmem fds.
 binder_call(untrusted_app_all, ashmemd)
-allow untrusted_app_all ashmem_device:chr_file { getattr read write ioctl };
+allow untrusted_app_all ashmem_device:chr_file { getattr read ioctl lock map append write };