Add sepolicy for ACPI bert_collector

bert_collector is a deamon that runs at boot, collects ACPI BERT
reports and sends them to DropBox.

Adds bert_collector.te policy for bert_collector deamon permissions.

Adds sysfs_firmware_acpi_tables context for /sys/firmware/acpi/tables.

Adds property acpi.bert_collector.start for starting bert_collector.

Bug: 357626966
Test: m && atest bert_collector_test

Change-Id: I4c583f3a9121474235ea8c78f65b74df86936a0b
diff --git a/private/file.te b/private/file.te
index 70b8523..662d5cc 100644
--- a/private/file.te
+++ b/private/file.te
@@ -182,6 +182,9 @@
 # Type for /sys/kernel/mm/pgsize_migration/enabled
 type sysfs_pgsize_migration, fs_type, sysfs_type;
 
+# /sys/firmware/acpi/tables
+type sysfs_firmware_acpi_tables, fs_type, sysfs_type;
+
 # Allow files to be created in their appropriate filesystems.
 allow fs_type self:filesystem associate;
 allow cgroup tmpfs:filesystem associate;