manifest: switch to our frameworks/av

Change-Id: I61735491ca41241d54d9e31752d047adbc8f67d2
diff --git a/omni-aosp.xml b/omni-aosp.xml
index a595e98..d2b275a 100644
--- a/omni-aosp.xml
+++ b/omni-aosp.xml
@@ -27,6 +27,7 @@
 
     <project path="external/drm_hwcomposer" name="android_external_drm_hwcomposer" remote="omnirom" revision="android-12.0" />
 
+    <project path="frameworks/av" name="android_frameworks_av" remote="omnirom" revision="android-12.0" />
     <project path="frameworks/base" name="android_frameworks_base" remote="omnirom" revision="android-12.0" />
     <project path="frameworks/native" name="android_frameworks_native" remote="omnirom" revision="android-12.0" />
     <project path="frameworks/opt/chips" name="android_frameworks_opt_chips" remote="omnirom" revision="android-12.0" />