Fixed call duration bug.

SimpleDateFormatter just wasn't working. This CL simplifies this method to
something similar to what we had before the call details rewrite. To avoid
going through the trouble of having the strings retranslated through the i18n
coordinator, I've left them as is and worked around it.

screenshots:
before: http://screen/eJqs5EijCYe
after:  http://screen/AbrLFn0caL0
Bug: 63370483
Test: existing
PiperOrigin-RevId: 169626011
Change-Id: I160529e276db2fc098a29b005db104e7ac601f15
1 file changed
tree: 63c324d398ddcf1a5063d0f8141c2d53c9ef36c0
  1. assets/
  2. java/
  3. Android.mk
  4. AndroidManifest.xml
  5. CONTRIBUTING
  6. LICENSE