opengl: detect android fence support and disable explicit if it's missing (#11077)

Checks for explicit sync support via the android fences, and falls back to implicit sync if it isn't

src/helpers/MonitorFrameScheduler.hpp

@@ -24,6 +24,7 @@ class CMonitorFrameScheduler {
   private:
     bool            canRender();
     void            onFinishRender();
+    bool            newSchedulingEnabled();
 
     bool            m_renderAtFrame = true;
     bool            m_pendingThird  = false;