Update action bar style in app header UI.

- Update background color of actionbar
- Remove elevation of actionbar so it appears to be the same entity as
  app header.
- Add a shadow below app header view. We can't set elevation on app
  header unfortunately because that will add shadow all round the view,
  but we only want shadow below it.
- Updated app icon size/text size per to match UI spec.

Change-Id: I63d7fa42b859a008fa662aaf19848cd40529c2ff
Fix: 37207527
Fix: 37079248
Test: visual && make RunSettingsRoboTests

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

@@ -16,6 +16,8 @@
 
 package com.android.settings.applications;
 
+import static com.android.settings.applications.AppHeaderController.ActionType;
+
 import android.app.Activity;
 import android.app.ActivityManager;
 import android.app.ActivityManager.RunningServiceInfo;
@@ -58,8 +60,6 @@ import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
 
-import static com.android.settings.applications.AppHeaderController.ActionType;
-
 public class ProcessStatsDetail extends SettingsPreferenceFragment {
 
     private static final String TAG = "ProcessStatsDetail";
@@ -137,7 +137,7 @@ public class ProcessStatsDetail extends SettingsPreferenceFragment {
                 ? mApp.mUiTargetApp.uid
                 : UserHandle.USER_NULL)
             .setButtonActions(ActionType.ACTION_APP_INFO, ActionType.ACTION_NONE)
-            .done(getPrefContext());
+            .done(activity, getPrefContext());
         getPreferenceScreen().addPreference(pref);
     }