Move process stats screen into memory screen.

- Move process stats from developer options to top level
   settings item.
 - Some minor UI changes to the top of the page
 - Major UI updates to detail page, now shows info with processes
   as pref categories and services as prefs, with a way to kill
   them (taken from Running Services page).
 - Some major refactorings in code, in attempt to make it more
   usable
 - Added color bar on per app basis to visualize the avg/max
   relationship
 - Updated the way avg is calculated across multiple entries in
   ProcStatsPackageEntry to be more accurate
 - Change the way max memory is calculated in
   ProcStatsPackageEntry to be less accurate but more useful

Bug: 19443802
Change-Id: Ia6aaabe42c415c50997a09bfb814a6f6e5731772

src/com/android/settings/DevelopmentSettings.java

@@ -164,8 +164,6 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
 
     private static final String SHOW_ALL_ANRS_KEY = "show_all_anrs";
 
-    private static final String PROCESS_STATS = "proc_stats";
-
     private static final String PACKAGE_MIME_TYPE = "application/vnd.android.package-archive";
 
     private static final String TERMINAL_APP_PACKAGE = "com.android.terminal";
@@ -246,7 +244,6 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
 
     private SwitchPreference mShowAllANRs;
 
-    private PreferenceScreen mProcessStats;
     private final ArrayList<Preference> mAllPrefs = new ArrayList<Preference>();
 
     private final ArrayList<SwitchPreference> mResetSwitchPrefs
@@ -397,9 +394,6 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
             mAllPrefs.add(hdcpChecking);
             removePreferenceForProduction(hdcpChecking);
         }
-
-        mProcessStats = (PreferenceScreen) findPreference(PROCESS_STATS);
-        mAllPrefs.add(mProcessStats);
     }
 
     private ListPreference addListPreference(String prefKey) {