Added Voice Action Intents

Added Voice Action Intents for Alarms, Clocks, Timers, and Stopwatch.
Fixed bugs that prevented the UI from going idle when
a timer/stopwatch is running.
Added Tests for intents from HandleVoiceApiCalls.
Removed static imports in HandleApiCalls.
Fixed a bug that didn't cancel a pending intent for an alarm
 after it was deleted.
 Integrated Intent Actions based on updates to AlarmClock.java MNC.

Bug: 21337563
Bug: 21337557
Bug: 21336697

Change-Id: If82bfad6487989839defc81483dff603c53e7cb8