feat(icons): Add phone-plus icon and update existing phone related icons (#1735)

Author: gabriellsh

.changeset/lemon-icons-wash.md

@@ -0,0 +1,5 @@
+---
+"@rocket.chat/icons": minor
+---
+
+feat(icons): Add `phone-plus` icon and update existing phone related icons

packages/icons/glyphsMapping.json

@@ -1004,5 +1004,8 @@
   },
   "inbox": {
     "start": "\ue165"
+  },
+  "phone-plus": {
+    "start": "\ue167"
   }
 }