DeskClock: Support double-digit hours for timers

Change-Id: I8aa4960c03d710ca7889c8d91701ca5b5376c9ef
DeskClock: Add feature to play random song as an alarm.

Patchset 10: Close open cursor

Change-Id: Ia3d2f28d71456ba16aac4474db15cddacada9410