Revert "[CCA] Remove fps selection icon"

This reverts commit 02ad8296.

Reason for revert: Feature re-enabled on M78.

Original change's description:
> [CCA] Remove fps selection icon
>
> BUG: 976602
> TEST: On device with constant 30/60 fps capability, the icon is not
> shown in video mode.
>
> Change-Id: I400144e25105a619ea3aff88ddfea0731d9128cf
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1717502
> Auto-Submit: Kuo Jen Wei <inker@chromium.org>
> Reviewed-by: Shik Chen <shik@chromium.org>
> Commit-Queue: Kuo Jen Wei <inker@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#680746}

TBR=shik@chromium.org,shenghao@chromium.org,inker@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: Icff3a1b6e7933374a9df8d05d185597d7de62fd4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1727830
Commit-Queue: Kuo Jen Wei <inker@chromium.org>
Reviewed-by: Kuo Jen Wei <inker@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682579}

chrome/browser/resources/chromeos/camera/src/css/main.css

@@ -460,7 +460,8 @@ body._10sec #toggle-timer:checked {
   background-image: url(../images/camera_button_mic_off.svg);
 }
 
-#toggle-fps {
+body:not(.multi-fps) #toggle-fps,
+body:not(.video-mode) #toggle-fps {
   display: none;
 }