Pixel Logger: Move logger_app sepolicy to Pixel specific area

In order to minimize the dependency concern, move the logger_app
sepolicy from device specific scope to Pixel scope.
It will include the general definition only, and device specific
definition will stay in the device specific scope (such as

Bug: 159650456
Test: Pixel Logger is workable
Change-Id: Iaa7ee3d28ae3c97ad42df68156b14c16099a3cac
2 files changed