Lockscreen : nextAlarm layout fix

Depending on the length of the next alarm, if middle alignment is chosen,
the left sliders get misaligned.

Cm report : http://code.google.com/p/cyanogenmod/issues/detail?id=4583

This patchset also makes maxLength for alarm texts 2lines

Change-Id: I1595a298da9b8d2e7374e5d4f461fefbed7cbc69