Reland "Use system's plat_sepolicy.cil for microdroid"

This reverts commit e2071485be4931ccf40cb7d84bcf03a760c9007d.

Reason for revert: fixed breakage

The breakage was due to the difference between plat_sepolicy.conf and
microdroid_vendor_sepolicy.conf. Now vendor_sepolicy.conf is built with
se_policy_conf module, so it is synced with plat_sepolicy.conf

Test: boot microdroid with and without SANITIZE_TARGET=address
Change-Id: Ib2bb5ec651f61fb9e6de370e055f4d2119d9e17f
1 file changed
tree: 5c756487af6cdfc56407aa2e526c4c8ee5eaa430
  1. apex/
  2. authfs/
  3. docs/
  4. microdroid/
  5. tests/
  6. virtmanager/
  7. vm/
  8. .clang-format
  9. PREUPLOAD.cfg