manifest: Track our ThemePicker repo

Change-Id: Ida3dc81d9f3366788e1cb7b0e25b25f49992d180
diff --git a/omni-aosp.xml b/omni-aosp.xml
index 1167621..705c902 100644
--- a/omni-aosp.xml
+++ b/omni-aosp.xml
@@ -54,6 +54,7 @@
     <project path="packages/apps/Messaging" name="android_packages_apps_Messaging" remote="omnirom" revision="android-15" />
     <project path="packages/apps/Settings" name="android_packages_apps_Settings" remote="omnirom" revision="android-15" />
     <project path="packages/apps/SettingsIntelligence" name="android_packages_apps_SettingsIntelligence" remote="omnirom" revision="android-15" />
+    <project path="packages/apps/ThemePicker" name="android_packages_apps_ThemePicker" remote="omnirom" revision="android-15" />
     <project path="packages/inputmethods/LatinIME" name="android_packages_inputmethods_LatinIME" remote="omnirom" revision="android-15" />
     <project path="packages/modules/Virtualization" name="android_packages_modules_Virtualization" remote="omnirom" revision="android-15" />
     <project path="packages/services/Mms" name="android_packages_services_Mms" remote="omnirom" revision="android-15" />