Move missed system_service.te into sepolicy/vendor/. Bug: b/175603696, b/194099793, b/194467316 Test: manual compile successfully with command "WITH_DEXPREOPT=true m -j100", target: adt3_gtv-userdebug Change-Id: Ifa737e3023a8907c7f6fdf83df5a5ea071b92933