Larger touch targets, snap to persisted value.

Extend ListView content to screen edges, and use InsetBoundsDrawable
to draw separator and divider with expected padding.  Sweep touch
targets are now much larger.

Snap sweep to persisted value, and fix NFE when parsing label value.

Bug: 5274249
Bug: 5262865
Bug: 5242857
Change-Id: Ifa0f3e622767d5b4dc85a73d6340207e6038a429

src/com/android/settings/applications/ManageApplications.java

@@ -646,7 +646,7 @@ public class ManageApplications extends Fragment implements
         tabHost.setOnTabChangedListener(this);
 
         // adjust padding around tabwidget as needed
-        prepareCustomPreferencesList(container, mTabHost, mListView);
+        prepareCustomPreferencesList(container, mTabHost, mListView, false);
 
         return mTabHost;
     }