Fix some sonar warnings and make some smaller improvements

Author: TobiGr

app/src/main/java/org/schabi/newpipe/player/PlayQueueActivity.java

@@ -585,11 +585,9 @@ private void onPlayModeChanged(final int repeatMode, final boolean shuffled) {
     }
 
     private void onPlaybackParameterChanged(@Nullable final PlaybackParameters parameters) {
-        if (parameters != null) {
-            if (menu != null && player != null) {
-                final MenuItem item = menu.findItem(R.id.action_playback_speed);
-                item.setTitle(formatSpeed(parameters.speed));
-            }
+        if (parameters != null && menu != null && player != null) {
+            final MenuItem item = menu.findItem(R.id.action_playback_speed);
+            item.setTitle(formatSpeed(parameters.speed));
         }
     }
 

app/src/main/java/org/schabi/newpipe/settings/tabs/TabsManager.java

@@ -73,10 +73,8 @@ public void unsetSavedTabsListener() {
 
     private SharedPreferences.OnSharedPreferenceChangeListener getPreferenceChangeListener() {
         return (sp, key) -> {
-            if (savedTabsKey.equals(key)) {
-                if (savedTabsChangeListener != null) {
-                    savedTabsChangeListener.onTabsChanged();
-                }
+            if (savedTabsKey.equals(key) && savedTabsChangeListener != null) {
+                savedTabsChangeListener.onTabsChanged();
             }
         };
     }