Add back button handling

bug:7332980

- fix crash as well.

Change-Id: Id93ee7c194df6ac5e38def2e5f0fb3c5ecc0c2e4
3 files changed
tree: 61cf4f055a48775e08db03b1fbc6ff9ed418ccd1
  1. gallerycommon/
  2. src/
  3. src_pd/
  4. tests/