Change packagename to telephony

Also move it under package network, so all of them belong to
com.android.settings.network.telephony.

Bug: 114749736
Test: RunSettingsRoboTests
Change-Id: I35dbdcd5cc9dab939b0a3efccc8897b9a92338d1
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index ec34514..f60d99e 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -131,7 +131,7 @@
                   android:launchMode="singleTask">
         </activity>
 
-        <activity android:name=".mobilenetwork.MobileSettingsActivity"
+        <activity android:name=".network.telephony.MobileSettingsActivity"
                   android:label="@string/network_settings_title"
                   android:theme="@style/Theme.Settings.Home"
                   android:launchMode="singleTask">