afohrman b4bc4fc7b0 Add missing icon text field demos and bring the demos to parity with each other.
This is pre-work for splitting the icon text fields into their own controllable demo screens. This commit:

- Adds an outline toggle password demo
- Removes unnecessary ids
- Reformats layout files
- Cleans up the demos

PiperOrigin-RevId: 239215370
2019-03-22 16:53:38 -04:00
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