Make TelephonyProvider's android:label more meaningful

Previously it was "Dialer Storage", which makes no sense (especially on
non-voice-capable devices).  Now it's "Phone/Messaging Storage" on phones
and "Mobile Network Configuration" on tablets.

Bug: 3378543
Change-Id: If8ea17b0ec41e16ac4d5646afdf8c77c05de115a
diff --git a/res/values/strings.xml b/res/values/strings.xml
index c61a41b..42a91f5 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -16,8 +16,16 @@
 
 <resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
 
-    <!-- This is the label for the application that stores phone data -->
-    <string name="app_label">Dialer Storage</string>
+    <!-- Official label of the TelephonyProvider, as seen in the "Manage
+         Applications" UI.  This is the version of the label for tablet
+         devices, where the TelephonyProvider stores configuration info
+         about the mobile data network. [CHAR LIMIT=40] -->
+    <string name="app_label" product="tablet">Mobile Network Configuration</string>
+
+    <!-- Official label of the TelephonyProvider, as seen in the "Manage
+         Applications" UI.  The TelephonyProvider stores configuration
+         info about the carrier and cell network, and also provides
+         storage for SMS and MMS messages. [CHAR LIMIT=25] -->
+    <string name="app_label" product="default">Phone/Messaging Storage</string>
 
 </resources>
-