Disable UI flags for non-desktop OSes

This is mostly to prevent the high res avatars from being downloaded when not necessary, and will also prevent any other non-UI side effects which are undesired on non-desktop OSes.

BUG=404066, 411428

Committed: https://chromium.googlesource.com/chromium/src/+/8003a95bb88e1d25ad59251b5d7e8609d76e5669

Review URL: https://codereview.chromium.org/480453002

Cr-Commit-Position: refs/heads/master@{#293723}

components/signin/core/common/profile_management_switches.cc

@@ -144,7 +144,12 @@ bool IsGoogleProfileInfo() {
 }
 
 bool IsNewAvatarMenu() {
+  // NewAvatarMenu is only available on desktop.
+#if defined(OS_ANDROID) || defined(OS_IOS) || defined(OS_CHROMEOS)
+  return false;
+#else
   return GetProcessState() >= STATE_NEW_AVATAR_MENU;
+#endif
 }
 
 bool IsNewProfileManagement() {