Update calls tab tab bar item

Author: elaine-signal

Signal/Symbols.xcassets/tabbar/tab-calls.imageset/Contents.json

@@ -0,0 +1,15 @@
+{
+  "images" : [
+    {
+      "filename" : "ios_tabs-calls.pdf",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  },
+  "properties" : {
+    "template-rendering-intent" : "template"
+  }
+}

Signal/Symbols.xcassets/tabbar/tab-calls.imageset/ios_tabs-calls.pdf

@@ -36,8 +36,8 @@ class HomeTabBarController: UITabBarController {
     lazy var callsListNavController = OWSNavigationController(rootViewController: callsListViewController)
     lazy var callsListTabBarItem = UITabBarItem(
         title: OWSLocalizedString("CALLS_LIST_TITLE", comment: "Title for the calls list view."),
-        image: UIImage(systemName: "phone.fill"),
-        selectedImage: UIImage(systemName: "phone.fill")
+        image: UIImage(named: "tab-calls"),
+        selectedImage: UIImage(named: "tab-calls")
     )
 
     var selectedTab: Tabs {