default.xml: remove deprecated 'InCallUI' repo

Omni's InCallUI feature is now built into the open-source Google dialer that we are currently using, therefore making it unnecessary to track.
Revert "default.xml: remove deprecated 'InCallUI' repo"

This reverts commit c71b77d8855f040d2ac2b46e8d5e6c1b92360d84.
Add back DSPManager to our builds
Use our android_system_media from omni (needed for DSPManager)

We need https://github.com/omnirom/android_system_media/commit/05df050a16637a64927fee8d10074838f8dd3a99
Use omni's system_media

No specific changes needed for non-legacy builds.
I couldn'd read last lines I hope this fixes it
Revert "I couldn'd read last lines I hope this fixes it"

This reverts commit 6b2689874e4dae2754d70c341b47cbab143f3007.
Merge remote-tracking branch 'upstream/kitkat-remix' into kitkat-remix