Make the app header bar more consistent.

- Don't include info link if just came from app info page
- include back button on app info page when launched from header
Bug: 22203029

Change-Id: I737332a487c41e0a93d161b55659700a1f936844

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

@@ -108,7 +108,7 @@ public class ProcessStatsUi extends ProcessStatsBase {
         }
         ProcessStatsPreference pgp = (ProcessStatsPreference) preference;
         MemInfo memInfo = mStatsManager.getMemInfo();
-        launchMemoryDetail((SettingsActivity) getActivity(), memInfo, pgp.getEntry());
+        launchMemoryDetail((SettingsActivity) getActivity(), memInfo, pgp.getEntry(), true);
 
         return super.onPreferenceTreeClick(preferenceScreen, preference);
     }