1. We have too many config properties set by PRODUCT_PROPERTY_OVERRIDES,
and these properties usually are not sensitive and allow all processes to read.
2. Since Android P, properties should follow naming rule to add "vendor",
and then this will cause properties to be labeled as vendor_default_prop.
By default, coredomain is not granted to read vendor_default_prop.
Actually these properties are read widely from system/vendor processes.
3. So we introduce "mtk_default_prop" type that grant read access to
all processes, including system and vendor.
MTK-Commit-Id: 18077a2cb14b7b1ddadb7000e8abb565f0fd49e3
Change-Id: Ia378db3dbb9d0bf388139be3419e013228c79d6e
CR-Id: ALPS03934986
Feature: [Android Default] SELinux, SEAndroid, and SE-MTK
[Detail]
Rename CT VoLTE system property and allow other module to access
persist.vendor.mtk_ct_volte_support.
MTK-Commit-Id: bc5a52b6998d941aa12c7532f095d1a8c67d663f
Change-Id: I33881fd6684dc76e148ac4917e5c146f949e24f7
CR-Id: ALPS03929399
Feature: [China Telecom]VoLTE Customization
[Detail] vendor_init is new introduced in Android P,
and related policies have not been created yet.
[Solution] Add policies for vendor_init
MTK-Commit-Id: 00dc11bf94cbb7909ef58482d7726ebe8b954782
Change-Id: Ic2286e8e3e67b4005c7e2df18d217275f069f208
CR-Id: ALPS03881723
Feature: [Android Default] SELinux, SEAndroid, and SE-MTK
