Fix app headers in settings

Use SettingsPreferenceFragment's method for pinned headers where
possible, and add a frame within the fragment for them to live in
otherwise so that this view doesn't end up on the activity.

Bug: 20886475
Change-Id: I985eb1497744ea50bfabed862e5088eb89df5b61

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

@@ -112,7 +112,7 @@ public class ProcessStatsDetail extends SettingsPreferenceFragment
     public void onViewCreated(View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
 
-        AppHeader.createAppHeader(getActivity(),
+        AppHeader.createAppHeader(this,
                 mApp.mUiTargetApp != null ? mApp.mUiTargetApp.loadIcon(mPm) : new ColorDrawable(0),
                 mApp.mUiLabel, null);
     }