Renderer: call updateStreams AFTER makeCurrent.

When using the OpenGL backend, updateStreams makes GL calls such as
glEGLImageTargetTexture2DOES and therefore requires a valid GL context.

filament/src/Renderer.cpp

@@ -492,12 +492,12 @@ bool FRenderer::beginFrame(FSwapChain* swapChain, backend::FrameFinishedCallback
     FEngine& engine = getEngine();
     FEngine::DriverApi& driver = engine.getDriverApi();
 
-    // NOTE: this makes synchronous calls to the driver
-    driver.updateStreams(&driver);
-
     mSwapChain = swapChain;
     swapChain->makeCurrent(driver);
 
+    // NOTE: this makes synchronous calls to the driver
+    driver.updateStreams(&driver);
+
     int64_t monotonic_clock_ns (std::chrono::steady_clock::now().time_since_epoch().count());
     driver.beginFrame(monotonic_clock_ns, mFrameId, callback, user);