Re-enable "start" button if loading voicemail fails.

An enabled "start" button is a cue to the user that they can re-attempt
downloading voicemail manually if the first attempt fails.

Bug: 23899613
Change-Id: Ie5baf6cf45c48d0f1988d01dbed3e31919510869
1 file changed
tree: b4ce897a5888ea6ae8ea9c38a325ac03b00d8e03
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. proguard.flags