Clock: fix layout for 320dp devices

800x480px dpi devices have less screen space than the xhdpi devices
Google designed the layout for and the layout needs adjustment.

The number in the timer (left-most tab) is cut off on older devices.
Adjust the weight (per Jie W.'s suggestion) so that it can be
displayed properly.

It is impossible to account for all languages with very long translation
for "H" "M" and "S", and that can only be fixed by de-localization or
re-localization.

This should not have any effect on devices with larger screens.

Change-Id: If61b676f220a6f1c39105fe3948946100a5f64b2
DeskClock: Add increasing volume option for alarm clocks

this commit adds a checkbox preference for "increasing volume" to
alarm clocks. when checked, the alarm will start off at 10% of the
system-wide alarm volume and slowly increase to 100% over the
course of a minute.

Original author for jb is Austen Dicken<cvpcsm@gmail.com>
jb-mr1 porters Davor Bertovic (LorD ClockaN) and maxwen

PS2: fix alarm ringtone layout issue

Change-Id: Ic097e344ed1570602f17f774faed7b612d47be73