Make KeyChainActivity.onBackPressed return null response

Also add some negative permissions tests to KeyChainServiceTest

Change-Id: I17d8c5e624db71b45f70c7c46ed49b8571ce323b
2 files changed
tree: db6738906b6b1ad6362e43aea6bd358785fe9065
  1. res/
  2. src/
  3. support/
  4. tests/
  5. Android.mk
  6. AndroidManifest.xml