improve invite strings

Fixes #4869
Closes #5393
//FREEBIE

res/layout/invite_activity.xml

@@ -68,7 +68,7 @@
                         android:drawableLeft="@drawable/ic_message_black_18dp"
                         android:drawableStart="@drawable/ic_message_black_18dp"
                         android:drawablePadding="10dp"
-                        android:text="@string/InviteActivity_send_sms"
+                        android:text="@string/InviteActivity_choose_contacts"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         tools:ignore="ButtonStyle" />

res/values/strings.xml

@@ -330,15 +330,15 @@
 
     <!-- InviteActivity -->
     <string name="InviteActivity_share">Share</string>
-    <string name="InviteActivity_send_sms">Send SMS</string>
+    <string name="InviteActivity_choose_contacts">Choose contacts</string>
     <string name="InviteActivity_cancel">Cancel</string>
     <string name="InviteActivity_sending">Sending...</string>
     <string name="InviteActivity_heart_content_description">Heart</string>
     <string name="InviteActivity_invitations_sent">Invitations sent!</string>
     <string name="InviteActivity_invite_to_signal">Invite to Signal</string>
-    <plurals name="InviteActivity_send_to_friends">
-        <item quantity="one">SEND TO 1 FRIEND</item>
-        <item quantity="other">SEND TO %d FRIENDS</item>
+    <plurals name="InviteActivity_send_sms_to_friends">
+        <item quantity="one">SEND SMS TO 1 FRIEND</item>
+        <item quantity="other">SEND SMS TO %d FRIENDS</item>
     </plurals>
     <plurals name="InviteActivity_send_sms_invites">
         <item quantity="one">Send 1 SMS invite?</item>

src/org/thoughtcrime/securesms/InviteActivity.java

@@ -120,7 +120,7 @@ public class InviteActivity extends PassphraseRequiredActionBarActivity implemen
   }
 
   private void updateSmsButtonText() {
-    smsSendButton.setText(getResources().getQuantityString(R.plurals.InviteActivity_send_to_friends,
+    smsSendButton.setText(getResources().getQuantityString(R.plurals.InviteActivity_send_sms_to_friends,
                                                            contactsFragment.getSelectedContacts().size(),
                                                            contactsFragment.getSelectedContacts().size()));
     smsSendButton.setEnabled(!contactsFragment.getSelectedContacts().isEmpty());