make minimum group members count 1 rather than 2

res/values/strings.xml

@@ -1747,7 +1747,7 @@
     <string name="activity_create_closed_group_empty_state_button_title">Start a Session</string>
     <string name="activity_create_closed_group_group_name_missing_error">Please enter a group name</string>
     <string name="activity_create_closed_group_group_name_too_long_error">Please enter a shorter group name</string>
-    <string name="activity_create_closed_group_not_enough_group_members_error">Please pick at least 2 group members</string>
+    <string name="activity_create_closed_group_not_enough_group_members_error">Please pick at least 1 group member</string>
     <string name="activity_create_closed_group_too_many_group_members_error">A closed group cannot have more than 10 members</string>
     <string name="activity_create_closed_group_invalid_session_id_error">One of the members of your group has an invalid Session ID</string>
 
@@ -1841,7 +1841,7 @@
     <string name="activity_edit_closed_group_add_members">Add members</string>
     <string name="activity_edit_closed_group_group_name_missing_error">Group name can\'t be empty</string>
     <string name="activity_edit_closed_group_group_name_too_long_error">Please enter a shorter group name</string>
-    <string name="activity_edit_closed_group_not_enough_group_members_error">Groups must have at least 2 group members</string>
+    <string name="activity_edit_closed_group_not_enough_group_members_error">Groups must have at least 1 group member</string>
     <string name="activity_edit_closed_group_too_many_group_members_error">A closed group cannot have more than 10 members</string>
     <string name="activity_edit_closed_group_invalid_session_id_error">One of the members of your group has an invalid Session ID</string>
     <string name="activity_edit_closed_group_confirm_removal">Are you sure you want to remove this user?</string>

src/org/thoughtcrime/securesms/loki/activities/CreateClosedGroupActivity.kt

@@ -115,7 +115,7 @@ class CreateClosedGroupActivity : PassphraseRequiredActionBarActivity(), LoaderM
             return Toast.makeText(this, R.string.activity_create_closed_group_group_name_too_long_error, Toast.LENGTH_LONG).show()
         }
         val selectedMembers = this.selectContactsAdapter.selectedMembers
-        if (selectedMembers.count() < 2) {
+        if (selectedMembers.count() < 1) {
             return Toast.makeText(this, R.string.activity_create_closed_group_not_enough_group_members_error, Toast.LENGTH_LONG).show()
         }
         if (selectedMembers.count() > ClosedGroupsProtocol.groupSizeLimit) { // Minus one because we're going to include self later
@@ -136,7 +136,7 @@ class CreateClosedGroupActivity : PassphraseRequiredActionBarActivity(), LoaderM
             return Toast.makeText(this, R.string.activity_create_closed_group_group_name_too_long_error, Toast.LENGTH_LONG).show()
         }
         val selectedMembers = this.selectContactsAdapter.selectedMembers
-        if (selectedMembers.count() < 2) {
+        if (selectedMembers.count() < 1) {
             return Toast.makeText(this, R.string.activity_create_closed_group_not_enough_group_members_error, Toast.LENGTH_LONG).show()
         }
         if (selectedMembers.count() > 10) {

src/org/thoughtcrime/securesms/loki/activities/EditClosedGroupActivity.kt

@@ -222,7 +222,7 @@ class EditClosedGroupActivity : PassphraseRequiredActionBarActivity() {
             isSSKBasedClosedGroup = false
         }
 
-        if (members.size < 2) {
+        if (members.size < 1) {
             return Toast.makeText(this, R.string.activity_edit_closed_group_not_enough_group_members_error, Toast.LENGTH_LONG).show()
         }