Turn on OMTC by default; fix crash when acquiring EGL surface

widget/android/AndroidBridge.cpp

@@ -1036,12 +1036,17 @@ AndroidBridge::RegisterCompositor()
         return NULL;
 
     AutoLocalJNIFrame jniFrame(env, 3);
+
     jmethodID registerCompositor = env->GetStaticMethodID(jFlexSurfaceView, "registerCxxCompositor", "()Lorg/mozilla/gecko/gfx/GLController;");
 
     jobject glController = env->CallStaticObjectMethod(jFlexSurfaceView, registerCompositor);
 
     sController.Acquire(env, glController);
+    sController.WaitForValidSurface();
+    sController.SetGLVersion(2);
+    sController.InitGLContext();
 
+    sController.WaitForValidSurface();
     return sController.GetEGLSurface();
 }