Update preference screen title.

- Add missing title to preference screen xml so that they will be used to
set the activity title when the fragment is launched.
- Also updated some incorrect preference screen titles.
- Overrides getTitle() in preference fragments that do not use the
preference screen xml.

Bug: 64564191
Test: blaze-bin/screenshots/android/i18nscreenshots/i18nscreenshots
Change-Id: Id72d5ddf18f0962bc484de8bbd847a2e55d6371e

src/com/android/settings/datausage/DataUsagePreference.java

@@ -16,23 +16,36 @@ package com.android.settings.datausage;
 
 import android.content.Context;
 import android.content.Intent;
+import android.content.res.TypedArray;
 import android.net.NetworkTemplate;
 import android.os.Bundle;
+import android.support.v4.content.res.TypedArrayUtils;
 import android.support.v7.preference.Preference;
 import android.text.format.Formatter;
 import android.util.AttributeSet;
 import com.android.internal.logging.nano.MetricsProto;
 import com.android.settings.R;
 import com.android.settings.Utils;
+import com.android.settings.core.InstrumentedPreferenceFragment;
 import com.android.settingslib.net.DataUsageController;
 
 public class DataUsagePreference extends Preference implements TemplatePreference {
 
     private NetworkTemplate mTemplate;
     private int mSubId;
+    private int mTitleRes;
 
     public DataUsagePreference(Context context, AttributeSet attrs) {
         super(context, attrs);
+        if (InstrumentedPreferenceFragment.usePreferenceScreenTitle()) {
+            final TypedArray a = context.obtainStyledAttributes(
+                    attrs, new int[] { com.android.internal.R.attr.title },
+                    TypedArrayUtils.getAttr(
+                            context, android.support.v7.preference.R.attr.preferenceStyle,
+                            android.R.attr.preferenceStyle), 0);
+            mTitleRes = a.getResourceId(0, 0);
+            a.recycle();
+        }
     }
 
     @Override
@@ -52,6 +65,11 @@ public class DataUsagePreference extends Preference implements TemplatePreferenc
         Bundle args = new Bundle();
         args.putParcelable(DataUsageList.EXTRA_NETWORK_TEMPLATE, mTemplate);
         args.putInt(DataUsageList.EXTRA_SUB_ID, mSubId);
+        if (mTitleRes > 0) {
+            return Utils.onBuildStartFragmentIntent(getContext(), DataUsageList.class.getName(),
+                    args, getContext().getPackageName(), mTitleRes, null, false,
+                    MetricsProto.MetricsEvent.VIEW_UNKNOWN);
+        }
         return Utils.onBuildStartFragmentIntent(getContext(), DataUsageList.class.getName(), args,
                 getContext().getPackageName(), 0, getTitle(), false,
                 MetricsProto.MetricsEvent.VIEW_UNKNOWN);