Update git submodules

* Update platform/system/sepolicy from branch 'master'
  to fabaac131a378a8a032b2ebb004dad612ce8d2f1
  - Merge "Delete more unused policies by CompOS"
  - Delete more unused policies by CompOS
    
    Bug: 205750213
    Test: TH
    Change-Id: Ie08465e8801a74d61f85715e85a856293c4232d5
    
1 file changed