omni-default manifest: Add hardware/omni/interfaces repo

Change-Id: If12f78c1e7fc206d43e3ef5c7cc49cf86148e043
diff --git a/omni-default.xml b/omni-default.xml
index 9e1d18f..3c8c6da 100644
--- a/omni-default.xml
+++ b/omni-default.xml
@@ -23,6 +23,7 @@
   <project path="external/tigervnc" name="android_external_tigervnc" remote="omnirom" revision="android-14.0" />
   <project path="external/vncflinger" name="android_external_vncflinger" remote="omnirom" revision="android-15" />
   <project path="external/vim" name="android_external_vim" remote="omnirom" revision="android-14.0" />
+  <project path="hardware/omni/interfaces" name="android_hardware_omni_interfaces" remote="omnirom" revision="android-15" />
 
   <project path="packages/apps/Matlog" name="android_packages_apps_Matlog" remote="omnirom" revision="android-14.0" />
   <project path="packages/apps/OmniLib" name="android_packages_apps_OmniLib" remote="omnirom" revision="android-15" />