manifest: add omni Messaging repo

Change-Id: I38e93a1031e3cc0f269e23becbbe38cd8ec393cc

omni-aosp.xml

@@ -57,6 +57,7 @@
   <project path="packages/apps/EmergencyInfo" name="android_packages_apps_EmergencyInfo" remote="omnirom" revision="android-8.1" />
   <project path="packages/apps/Launcher3" name="android_packages_apps_Launcher3" remote="omnirom" revision="android-8.1" />
   <project path="packages/apps/Gallery2" name="android_packages_apps_Gallery2" remote="omnirom" revision="android-8.1" />
+  <project path="packages/apps/Messaging" name="android_packages_apps_Messaging" remote="omnirom" revision="android-8.1" />
   <project path="packages/apps/MusicFX" name="android_packages_apps_MusicFX" remote="omnirom" revision="android-8.1" />
   <project path="packages/apps/Nfc" name="android_packages_apps_Nfc" remote="omnirom" revision="android-8.1" />
   <project path="packages/apps/PhoneCommon" name="android_packages_apps_PhoneCommon" remote="omnirom" revision="android-8.1" />

remove.xml

@@ -109,6 +109,7 @@
   <remove-project name="platform/packages/apps/Gallery2" />
   <remove-project name="platform/packages/apps/Launcher2" />
   <remove-project name="platform/packages/apps/Launcher3" />
+  <remove-project name="platform/packages/apps/Messaging" />
   <remove-project name="platform/packages/apps/Music" />
   <remove-project name="platform/packages/apps/MusicFX" />
   <remove-project name="platform/packages/apps/Nfc" />