New dream settings - first cut

First draft implementation of mocks for dream settings.

Want to merge for the weekly build, so a few things remain, namely:
  - flat style for preview/settings buttons + dividers
  - animation between dream row expanded/collapsed state
  - wire up the help url
  - possibly ditch the non-standard style
  - add logging
  - refresh when packages are installed/uninstalled

Bug:7010260
Change-Id: I96e3ab944170925bd76edf7b8b1127adfffc6262

src/com/android/settings/DisplaySettings.java

@@ -232,13 +232,11 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
     }
 
     private void updateScreenSaverSummary() {
-        boolean activatedOnSleep = DreamSettings.isScreenSaverActivatedOnSleep(getActivity());
-        boolean activatedOnDock = DreamSettings.isScreenSaverActivatedOnDock(getActivity());
-        mScreenSaverPreference.setSummary(
-                activatedOnSleep && activatedOnDock ? R.string.screensaver_settings_summary_both :
-                activatedOnSleep ? R.string.screensaver_settings_summary_sleep :
-                activatedOnDock ? R.string.screensaver_settings_summary_dock :
-                R.string.screensaver_settings_summary_off);
+        int summaryResId = DreamSettings.getSummaryResource(getActivity());
+        if (summaryResId > 0)
+            mScreenSaverPreference.setSummary(summaryResId);
+        else
+            mScreenSaverPreference.setSummary("");
     }
 
     private void updateAccelerometerRotationCheckbox() {