Change text of dialog box confirming blocking.

Blocking users now also blocks incoming calls, so the block confirmation
message has been updated.

fixes #4217
Closes #4295

// FREEBIE

res/values/strings.xml

@@ -337,7 +337,7 @@
 
     <!-- RecipientPreferencesActivity -->
     <string name="RecipientPreferenceActivity_block_this_contact_question">Block this contact?</string>
-    <string name="RecipientPreferenceActivity_you_will_no_longer_see_messages_from_this_user">You will no longer see messages sent from this user.</string>
+    <string name="RecipientPreferenceActivity_you_will_no_longer_receive_calls_or_messages_from_this_user">You will no longer receive calls or messages from this user.</string>
     <string name="RecipientPreferenceActivity_block">Block</string>
     <string name="RecipientPreferenceActivity_unblock_this_contact_question">Unblock this contact?</string>
     <string name="RecipientPreferenceActivity_are_you_sure_you_want_to_unblock_this_contact">Are you sure you want to unblock this contact?</string>

src/org/thoughtcrime/securesms/RecipientPreferenceActivity.java

@@ -382,7 +382,7 @@ public class RecipientPreferenceActivity extends PassphraseRequiredActionBarActi
       private void handleBlock() {
         new AlertDialogWrapper.Builder(getActivity())
             .setTitle(R.string.RecipientPreferenceActivity_block_this_contact_question)
-            .setMessage(R.string.RecipientPreferenceActivity_you_will_no_longer_see_messages_from_this_user)
+            .setMessage(R.string.RecipientPreferenceActivity_you_will_no_longer_receive_calls_or_messages_from_this_user)
             .setCancelable(true)
             .setNegativeButton(android.R.string.cancel, null)
             .setPositiveButton(R.string.RecipientPreferenceActivity_block, new DialogInterface.OnClickListener() {