res:launcher:: fix the uninstall problem.

1. too manay signals.
2. uninstall failed.

tower: https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/ac5d3963f334428bbd8ad2f9d5bd9e82/

Change-Id: I7f6d61e31b893f1254366f8274fb145e4c3e5c0c