android: update OpenDelta to android-9.0

Change-Id: I45b870bf72d379dc441f4f73cd1d87eaee2722e4
diff --git a/omni-default.xml b/omni-default.xml
index a4d1822..fa5a10d 100644
--- a/omni-default.xml
+++ b/omni-default.xml
@@ -29,6 +29,6 @@
   <project path="packages/services/OmniJaws" name="android_packages_services_OmniJaws" remote="omnirom" revision="android-9.0" />
   <project path="packages/apps/OmniStyle" name="android_packages_apps_OmniStyle" remote="omnirom" revision="android-9.0" />
   <project path="packages/apps/OmniSwitch" name="android_packages_apps_OmniSwitch" remote="omnirom" revision="android-9.0" />
-  <project path="packages/apps/OpenDelta" name="android_packages_apps_OpenDelta" remote="omnirom" revision="android-8.1" />
+  <project path="packages/apps/OpenDelta" name="android_packages_apps_OpenDelta" remote="omnirom" revision="android-9.0" />
   <project path="packages/apps/Phonograph" name="android_packages_apps_Phonograph" remote="omnirom" revision="android-9.0" />
 </manifest>