Fix TODO for mobile network settings

1. Add intent filter to MobileNetworkActivity(new page)
2. Add metrics id
3. Remove obsolete TODOs

Bug: 114749736
Test: Manual
Change-Id: I36f41983dc8cc36ccdf548174fc494044ec1b241

src/com/android/settings/network/telephony/MobileDataDialogFragment.java

@@ -17,6 +17,7 @@
 package com.android.settings.network.telephony;
 
 import android.app.Dialog;
+import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.os.Bundle;
@@ -109,8 +110,7 @@ public class MobileDataDialogFragment extends InstrumentedDialogFragment impleme
 
     @Override
     public int getMetricsCategory() {
-        //TODO(b/114749736): add metric id for this fragment
-        return 0;
+        return SettingsEnums.MOBILE_DATA_DIALOG;
     }
 
     @Override

src/com/android/settings/network/telephony/MobileNetworkSettings.java

@@ -196,7 +196,6 @@ public class MobileNetworkSettings extends RestrictedDashboardFragment {
         }
     }
 
-    //TODO(b/114749736): update search provider
     public static final Indexable.SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
             new BaseSearchIndexProvider() {
                 @Override

src/com/android/settings/network/telephony/PreferredNetworkModePreferenceController.java

@@ -116,8 +116,6 @@ public class PreferredNetworkModePreferenceController extends BasePreferenceCont
     }
 
     private int getPreferredNetworkModeSummaryResId(int NetworkMode) {
-        //TODO(b/114749736): refactor it to "Preferred network mode: <Mode>", instead of building
-        // string for each type...
         switch (NetworkMode) {
             case TelephonyManager.NETWORK_MODE_TDSCDMA_GSM_WCDMA:
                 return R.string.preferred_network_mode_tdscdma_gsm_wcdma_summary;

src/com/android/settings/network/telephony/RoamingDialogFragment.java

@@ -17,6 +17,7 @@ package com.android.settings.network.telephony;
 
 import android.app.AlertDialog;
 import android.app.Dialog;
+import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
@@ -78,8 +79,7 @@ public class RoamingDialogFragment extends InstrumentedDialogFragment implements
 
     @Override
     public int getMetricsCategory() {
-        //TODO(b/114749736): add category for roaming dialog
-        return 0;
+        return SettingsEnums.MOBILE_ROAMING_DIALOG;
     }
 
     @Override