add setting for default video mute state

Clover/app/src/main/java/org/floens/chan/core/presenter/ImageViewerPresenter.java

@@ -58,11 +58,13 @@ public class ImageViewerPresenter implements MultiImageView.Callback, ViewPager.
     private boolean viewPagerVisible = false;
     private boolean changeViewsOnInTransitionEnd = false;
 
-    private boolean muted = true;
+    private boolean muted;
 
     public ImageViewerPresenter(Callback callback) {
         this.callback = callback;
         inject(this);
+
+        muted = ChanSettings.videoDefaultMuted.get();
     }
 
     public void showImages(List<PostImage> images, int position, Loadable loadable) {

Clover/app/src/main/java/org/floens/chan/core/settings/ChanSettings.java

@@ -131,6 +131,7 @@ public class ChanSettings {
     public static final BooleanSetting neverHideToolbar;
     public static final BooleanSetting controllerSwipeable;
     public static final BooleanSetting saveBoardFolder;
+    public static final BooleanSetting videoDefaultMuted;
 
     public static final BooleanSetting watchEnabled;
     public static final BooleanSetting watchCountdown;
@@ -207,6 +208,7 @@ public class ChanSettings {
         neverHideToolbar = new BooleanSetting(p, "preference_never_hide_toolbar", false);
         controllerSwipeable = new BooleanSetting(p, "preference_controller_swipeable", true);
         saveBoardFolder = new BooleanSetting(p, "preference_save_subboard", false);
+        videoDefaultMuted = new BooleanSetting(p, "preference_video_default_muted", true);
 
         watchEnabled = new BooleanSetting(p, "preference_watch_enabled", false);
         watchEnabled.addCallback((setting, value) ->

Clover/app/src/main/java/org/floens/chan/ui/controller/MediaSettingsController.java

@@ -101,6 +101,10 @@ public class MediaSettingsController extends SettingsController {
                     R.string.setting_save_original_filename,
                     R.string.setting_save_original_filename_description));
 
+            media.add(new BooleanSettingView(this, ChanSettings.videoDefaultMuted,
+                    R.string.setting_video_default_muted,
+                    R.string.setting_video_default_muted_description));
+
             media.add(new BooleanSettingView(this, ChanSettings.videoOpenExternal,
                     R.string.setting_video_open_external,
                     R.string.setting_video_open_external_description));

Clover/app/src/main/res/values/strings.xml

@@ -520,6 +520,8 @@ Re-enable this permission in the app settings if you permanently disabled it."</
     <string name="setting_save_original_filename">Save original filename</string>
     <string name="setting_save_original_filename_description">Save the image with the filename the site assigned.
         If disabled, save the image with the filename from the uploader.</string>
+    <string name="setting_video_default_muted">Start videos muted</string>
+    <string name="setting_video_default_muted_description">If a video has audio, mute it by default.</string>
     <string name="setting_video_open_external">Open videos external</string>
     <string name="setting_video_open_external_description">Open videos in an external media player</string>
     <string name="setting_share_url">Share url to image</string>