Not to set IME when the current IME was disabled, because framework will find...

Not to set IME when the current IME was disabled, because framework will find an applicable IME when the current IME was unset.

Bug: 3186000

- This enables us to share the code between Settings and the framework.
- Removed the parameter for lastImeTicked because an applicable IME can be found in the framework.

Change-Id: Icfb6168c5a22506f225bfe58425adeb540835456