add Interfacer package

Change-Id: I500190c145eb4ee2746d0f02518769b7094670e4

omni-default.xml

@@ -22,6 +22,7 @@
   <project path="packages/apps/Apollo" name="android_packages_apps_Apollo" remote="omnirom" revision="android-7.1" />
   <project path="packages/apps/DSPManager" name="android_packages_apps_DSPManager" remote="omnirom" revision="android-7.1" />
   <project path="packages/apps/Gallery2" name="android_packages_apps_Gallery2" remote="omnirom" revision="android-7.1" />
+  <project path="packages/apps/Interfacer" name="android_packages_apps_Interfacer" remote="omnirom" revision="android-7.1" />
   <project path="packages/apps/MonthCalendarWidget" name="android_packages_apps_MonthCalendarWidget" remote="omnirom" revision="android-7.1" />
   <project path="packages/apps/OmniClock" name="android_packages_apps_OmniClock" remote="omnirom" revision="android-7.1" />
   <project path="packages/apps/OmniGears" name="android_packages_apps_OmniGears" remote="omnirom" revision="android-7.1" />