Add MSIM support for FDN.

Show title and get the Phone object to modify FDN settings for
according to subscription..

+ Add helper to provide common functionality for setting/getting
extras, getting the appropriate phone for a given subscription id,
and other miscellaneous things.

+ Show the subscription label in actionbar title of Call settings,
FDN settings, and FDN list. I didn't do this for edit/delete because
they have really long titles, and the context didn't seem necessary
at that point.

+ Pass the subscription label/id along in intents to the various FDN
setting activities.

+ Get the correct phone, so FDN setting changes are SIM-specific.

+ Take into account subscription id when providing a Uri for
modifying FDN settings, so that FDN contacts can be modified on a
per-sim basis.

- Delete some unused strings.

Bug: 18233666
Bug: 18232723
Bug: 18114923
Change-Id: I05c7149382adb7e7af36d38bab8a6875d5b20609
diff --git a/src/com/android/phone/SubscriptionInfoHelper.java b/src/com/android/phone/SubscriptionInfoHelper.java
new file mode 100644
index 0000000..926a156
--- /dev/null
+++ b/src/com/android/phone/SubscriptionInfoHelper.java
@@ -0,0 +1,116 @@
+/**
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.phone;
+
+import android.app.ActionBar;
+import android.content.Context;
+import android.content.Intent;
+import android.content.res.Resources;
+import android.telephony.SubInfoRecord;
+import android.telephony.SubscriptionManager;
+import android.text.TextUtils;
+
+import com.android.phone.PhoneGlobals;
+import com.android.internal.telephony.Phone;
+import com.android.internal.telephony.PhoneFactory;
+
+/**
+ * Helper for manipulating intents or components with subscription-related information.
+ *
+ * In settings, subscription ids and labels are passed along to indicate that settings
+ * are being changed for particular subscriptions. This helper provides functions for
+ * helping extract this info and perform common operations using this info.
+ */
+public class SubscriptionInfoHelper {
+    private static final int NO_SUB_ID = -1;
+
+    // Extra on intent containing the id of a subscription.
+    private static final String SUB_ID_EXTRA =
+            "com.android.phone.settings.SubscriptionInfoHelper.SubscriptionId";
+    // Extra on intent containing the label of a subscription.
+    private static final String SUB_LABEL_EXTRA =
+            "com.android.phone.settings.SubscriptionInfoHelper.SubscriptionLabel";
+
+    private static int mSubId = NO_SUB_ID;
+    private static String mSubLabel;
+
+    /**
+     * Instantiates the helper, by extracting the subscription id and label from the intent.
+     */
+    public SubscriptionInfoHelper(Intent intent) {
+        mSubId = intent.getIntExtra(SUB_ID_EXTRA, NO_SUB_ID);
+        mSubLabel = intent.getStringExtra(SUB_LABEL_EXTRA);
+    }
+
+    /**
+     * @param context The context.
+     * @param newActivityClass The class of the activity for the intent to start.
+     * @return Intent containing extras for the subscription id and label if they exist.
+     */
+    public Intent getIntent(Context context, Class newActivityClass) {
+        Intent intent = new Intent(context, newActivityClass);
+
+        if (hasSubId()) {
+            intent.putExtra(SUB_ID_EXTRA, mSubId);
+        }
+
+        if (!TextUtils.isEmpty(mSubLabel)) {
+            intent.putExtra(SUB_LABEL_EXTRA, mSubLabel);
+        }
+
+        return intent;
+    }
+
+    public static void addExtrasToIntent(Intent intent, SubInfoRecord subscription) {
+        intent.putExtra(SubscriptionInfoHelper.SUB_ID_EXTRA, subscription.getSubscriptionId());
+        intent.putExtra(
+                SubscriptionInfoHelper.SUB_LABEL_EXTRA, subscription.getDisplayName().toString());
+    }
+
+    /**
+     * @return Phone object. If a subscription id exists, it returns the phone for the id.
+     */
+    public Phone getPhone() {
+        return hasSubId()
+                ? PhoneFactory.getPhone(SubscriptionManager.getPhoneId(mSubId))
+                : PhoneGlobals.getPhone();
+    }
+
+    /**
+     * Sets the action bar title to the string specified by the given resource id, formatting
+     * it with the subscription label. This assumes the resource string is formattable with a
+     * string-type specifier.
+     *
+     * If the subscription label does not exists, leave the existing title.
+     */
+    public void setActionBarTitle(ActionBar actionBar, Resources res, int resId) {
+        if (actionBar == null || TextUtils.isEmpty(mSubLabel)) {
+            return;
+        }
+
+        String title = String.format(res.getString(resId), mSubLabel);
+        actionBar.setTitle(title);
+    }
+
+    public boolean hasSubId() {
+        return mSubId != NO_SUB_ID;
+    }
+
+    public int getSubId() {
+        return mSubId;
+    }
+}