Increase SearchView touch targets to meet GAR3.

- Allow SearchView to expand to 48dp height if possible.
- Make the search clear button have 48dp height if possible.
- Expand the search TextView touch target height to 48dp is possible.

Framework version of patch ag/912646

Bug: 19479861
Change-Id: Ibaaef2afa20b8c05eaac8f028df4f616f2f96eb1
4 files changed