Revert "Update default.xml"

This reverts commit 0cf7cf0d89dfcb10facfb9a0df80b8f162fd83ef.
Revert "manifest.xml: retry with CM Camera Sources"

This reverts commit eceecf1f561149c71fa9394f68717a4fb72bcb5d.
Revert "default.xml: try to use Camera2 source from OmniROM"

This reverts commit e8bf0688d4c21d1614e970479cb1d12d9e6d9bd0.