Modify image attachments previews to conform to UX specs

Thumbnail and full image start loading at the same time.

Once thumbnail is shown, we display a determinate progress bar while downloading
the full image.

Remove progress bar from image tiles in ConversationView.

Bug: 8021747
Change-Id: Ic1c7e7fcdc5683ad9e899c82b6bbdb5861d16a55
3 files changed
tree: b3b569a0f7d9877957d4fc0faed484d66feeadff
  1. res/
  2. sample/
  3. src/
  4. .gitignore
  5. Android.mk
  6. AndroidManifest.xml