afohrman 04955f6421 Add placeholder text functionality to TextInputLayout.
This is the initial implementation of placeholder text; it does not contain motion. At this stage, TextInputLayout sets the placeholder text visibility based on whether or not it should show.

PiperOrigin-RevId: 264230778
2019-08-20 11:19:02 -04:00
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2019-06-24 17:06:45 -04:00
2019-07-29 16:40:06 -04:00