Bug 1869353 - Add a pref to disable Android SurfaceControl rendering path. r=geckoview-reviewers,jonalmeida

Differential Revision: https://phabricator.services.mozilla.com/D196069

modules/libpref/init/StaticPrefList.yaml

@@ -15859,6 +15859,12 @@
 #endif
   mirror: always
 
+# Whether to render in to a child SurfaceControl rather than directly into the SurfaceView
+- name: widget.android.use-surfacecontrol
+  type: bool
+  value: true
+  mirror: once
+
 #---------------------------------------------------------------------------
 # Prefs starting with "zoom."
 #---------------------------------------------------------------------------

widget/android/nsWindow.cpp

@@ -1290,8 +1290,10 @@ class LayerViewSupport final
     mY = aY;
     mWidth = aWidth;
     mHeight = aHeight;
-    mSurfaceControl =
-        java::sdk::SurfaceControl::GlobalRef::From(aSurfaceControl);
+    if (StaticPrefs::widget_android_use_surfacecontrol_AtStartup()) {
+      mSurfaceControl =
+          java::sdk::SurfaceControl::GlobalRef::From(aSurfaceControl);
+    }
     if (mSurfaceControl) {
       // When using SurfaceControl, we create a child Surface to render in to
       // rather than rendering directly in to the Surface provided by the