feat: Make PiP checkbox disable the entire feature, not just video controls, b=(no-bug), c=no-component

src/browser/app/profile/zen-browser.js

@@ -475,3 +475,4 @@ pref("layers.gpu-process.enabled", true);
 
 // Picture-in-picture
 pref("media.videocontrols.picture-in-picture.video-toggle.enabled", true);
+pref("media.videocontrols.picture-in-picture.enable-when-switching-tabs.enabled", true);

src/browser/components/preferences/main-inc-xhtml.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/components/preferences/main.inc.xhtml b/browser/components/preferences/main.inc.xhtml
-index cdcf50ec1bc4a54c69f5baf4a6d40ab0c63a8121..87603323c2b0b9ea0c847a8a06e293a16c1252b8 100644
+index cdcf50ec1bc4a54c69f5baf4a6d40ab0c63a8121..105c008447377dbd48ff91c90586aa8981e407f5 100644
 --- a/browser/components/preferences/main.inc.xhtml
 +++ b/browser/components/preferences/main.inc.xhtml
 @@ -183,6 +183,7 @@
@@ -26,3 +26,12 @@ index cdcf50ec1bc4a54c69f5baf4a6d40ab0c63a8121..87603323c2b0b9ea0c847a8a06e293a1
  
    <checkbox id="useSystemLocale" hidden="true"
              data-l10n-id="use-system-locale"
+@@ -795,7 +798,7 @@
+     <checkbox id="pictureInPictureToggleEnabled"
+             class="tail-with-learn-more"
+             data-l10n-id="browsing-picture-in-picture-toggle-enabled"
+-            preference="media.videocontrols.picture-in-picture.video-toggle.enabled"/>
++            preference="media.videocontrols.picture-in-picture.enabled"/>
+     <html:a is="moz-support-link"
+           data-l10n-id="browsing-picture-in-picture-learn-more"
+           support-page="picture-in-picture"

src/browser/components/preferences/zen-settings.js

@@ -1024,4 +1024,9 @@ Preferences.addAll([
     type: 'bool',
     default: true,
   },
+  {
+    id: 'media.videocontrols.picture-in-picture.enabled',
+    type: 'bool',
+    default: true,
+  },
 ]);