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/property.te b/private/property.te
index fb5251f..40beca5 100644
--- a/private/property.te
+++ b/private/property.te
@@ -19,6 +19,7 @@
 system_internal_prop(device_config_swcodec_native_prop)
 system_internal_prop(device_config_tethering_u_or_later_native_prop)
 system_internal_prop(dmesgd_start_prop)
+system_internal_prop(bert_collector_start_prop)
 system_internal_prop(fastbootd_protocol_prop)
 system_internal_prop(gsid_prop)
 system_internal_prop(init_perf_lsm_hooks_prop)