List item backgrounds are black on Android 2.3

[Boris Burtin]

For some reason we're displaying list items as black text on a black background on Android 2.3. Need to figure this out before shipping.

[Boris Burtin]

This is happening in the sound chooser and trigger properties dialogs.

[Boris Burtin]

commit 1932d6b79b6752617bcf1168dbaa7ad35416f2a9 Author: Boris Burtin [e-mail] Date: Fri Apr 26 11:43:47 2013 -0700

Issue #6: List item backgrounds are black on Android 2.3
Issue #24: Show details in the sound chooser

The background for list items in the sound chooser and
the trigger properties dialog is now white on all platforms.

Updated the trigger properties dialog layout so that
it looks better on small screens.  Removed hardcoded
width from the fade in/out time seek bars.

Time format strings are now resources.  This allows us to
localize time formatting if necessary.

The sound chooser now shows the album and length in minutes
and seconds for each track.

Fixed a race condition in BillingHelper.  We were initializing
BillingHelper in MainActivity's onPause() and disposing it in
onResume().  This created the possibility that we would dispose
IabHelper while it was still initializing.  This then led to an
NPE in the listener, since iabHelper was set to null.

Now initializing BillingHelper in MainActivity.onCreate() and
disposing it in onDestroy(), to avoid the race condition.

Moved TimeParts to the util package and added a unit test for
the toString() method.