Read unread count in tabs with context in Talkback mode.

Read the unread count as "x unread items" in the tab title.

Bug: 25122434
Change-Id: I1acbebdae979c7ef6c177713ccbe59af6e16a949
diff --git a/src/com/android/contacts/common/list/ViewPagerTabs.java b/src/com/android/contacts/common/list/ViewPagerTabs.java
index dd1fd9a..f1fb6f9 100644
--- a/src/com/android/contacts/common/list/ViewPagerTabs.java
+++ b/src/com/android/contacts/common/list/ViewPagerTabs.java
@@ -184,8 +184,14 @@
             if (mUnreadCounts != null && mUnreadCounts[position] > 0) {
                 textView.setText(Integer.toString(mUnreadCounts[position]));
                 textView.setVisibility(View.VISIBLE);
+                iconView.setContentDescription(getResources().getQuantityString(
+                        R.plurals.tab_title_with_unread_items,
+                        mUnreadCounts[position],
+                        tabTitle.toString(),
+                        mUnreadCounts[position]));
             } else {
                 textView.setVisibility(View.INVISIBLE);
+                iconView.setContentDescription(tabTitle);
             }
             tabView = layout;
         } else {