Read exif test images from the external storage of the test package

We can now add more exif test images under the application's private Pictures
directory, and put their corresponding xml files under Xml directory.
The tests will try to load them and use them as a testcase.

Change-Id: I2bc82bb7703e3a4516d1bc433ac5fabed2080987
6 files changed
tree: b043b59dbf433b7e5f30f720f6b43629a12f8b4d
  1. gallerycommon/
  2. src/
  3. src_pd/
  4. tests/