[Detail]
Add poilcy for update_engine and vbmeta so that A/B
system update can work well.
MTK-Commit-Id: de7ad7a48111b4e02f042600c6e65484d03ac87f
Change-Id: I79346615ad1be4c5ea33343c1fce73c22be1f82f
CR-Id: ALPS03783870
Feature: Secure Boot
Some rules is no need any more, need to remove it.
MTK-Commit-Id: 49685f1299d990a7195a2d54b955517d8f2cc699
Change-Id: I4a590ad781589cf94989ce72c88751ac10b82eae
CR-Id: ALPS03982747
Feature: [Android Default] SELinux, SEAndroid, and SE-MTK
[Detail] Google add new neverallows rules on android P,
some rule violate the rules
[Solution] Remove the rules which violate google new rules
MTK-Commit-Id: ff683b4eee0a6dd95ff25fbb6c7d1fc3a79c604d
Change-Id: Iead494212c6adcec234eaef14c83d1f8c7a49deb
CR-Id: ALPS03825066
Feature: [Android Default] SELinux, SEAndroid, and SE-MTK