[CRD iOS] Add the host setup instruction page

remoting/ios/app/remoting_theme.mm

Index: remoting/ios/app/remoting_theme.mm
diff --git a/remoting/ios/app/remoting_theme.mm b/remoting/ios/app/remoting_theme.mm
index fde5c9ae68e1535edb5ee271a04d0c42a620f22d..7fbf87cc0aea587d5e0cf3961e9c7c8db73f2bbb 100644
--- a/remoting/ios/app/remoting_theme.mm
+++ b/remoting/ios/app/remoting_theme.mm
@@ -46,7 +46,7 @@
   static UIColor* color;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
-    color = [UIColor colorWithRed:0.75f green:0.75f blue:0.75f alpha:1.f];
+    color = [UIColor colorWithWhite:0.87f alpha:1.f];
   });
   return color;
 }
@@ -55,11 +55,32 @@
   static UIColor* color;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
-    color = [UIColor colorWithRed:0.20f green:0.70f blue:0.20f alpha:1.f];
+    color = [UIColor colorWithRed:0.40f green:0.75f blue:0.40f alpha:1.f];
   });
   return color;
 }
 
++ (UIColor*)buttonTextColor {
+  return UIColor.whiteColor;
+}
+
++ (UIColor*)setupListBackgroundColor {
+  static UIColor* color;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    color = [UIColor colorWithWhite:1.f alpha:0.9f];
+  });
+  return color;
+}
+
++ (UIColor*)setupListTextColor {
+  return UIColor.grayColor;
+}
+
++ (UIColor*)setupListNumberColor {
+  return UIColor.whiteColor;
+}
+
 #pragma mark - Icons
 
 + (UIImage*)arrowIcon {