GitLab

Some clean-up UI/string changes:

* Change "No SD card found" to "SD card not found" in case the user had
another SD card but we weren't able to find one of them.
* Include a "No available download locations" message to be shown on the
settings page in the corner case where the user has no download options.
* Increase the size of the title text for the download location spinner
preference (same as other preferences).

Bug: 792775
Change-Id: I8c0a972f793b263ce59c090906e64192477c67b4
Reviewed-on: https://chromium-review.googlesource.com/1022521Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Joy Ming <jming@chromium.org>
Cr-Commit-Position: refs/heads/master@{#552869}