Various LDPI fixes

These fixes contain:

* Alarm Dialog perfection in DeskClock.
* Dark Delete button and resized no favourites image to fit the screen in Dialer.
* Framework image improvements.
* Lockscreen Media icon improvements.
* Battery Icon perfection for LDPI.

Change-Id: I058a33e3dea4df1d30f9e16e73c33b62b8fcf1c4