sepolicy: Add vm block devices labeling

Add VM (virtual machine) partition block devices and associated
firmware file labeling and handling policies.

Centralize update_engine_common.te under generic/vendor/common
as the content are all common at this time.

Change-Id: Iba8bf4150db861f97bc9b78b70683f73b6fa7607
diff --git a/generic/vendor/common/device.te b/generic/vendor/common/device.te
index 78d13d9..1678799 100644
--- a/generic/vendor/common/device.te
+++ b/generic/vendor/common/device.te
@@ -44,6 +44,7 @@
 type vendor_modem_efs_partition_device, dev_type;
 type vendor_mdtp_device, dev_type;
 type vendor_persist_block_device, dev_type;
+type vendor_vm_data_block_device, dev_type;
 type vendor_qsee_ipc_irq_spss_device, dev_type;
 type vendor_qdsp_device, dev_type, mlstrustedobject;
 type vendor_ramdump_device, dev_type;