Fix crash in Vulkan pipeline at boot time

Fix a crash caused by calling OpenGL APIs with Vulkan pipeline
(likely a regression from ag/2706458).

Test: Ran CtsViewTestCases tests with SkiaGL pipeline.
Change-Id: Ibabeb4229ef88de57c99f2961a10a68ca71b25ab

libs/hwui/Extensions.cpp

@@ -31,6 +31,12 @@ namespace android {
 namespace uirenderer {
 
 Extensions::Extensions() {
+    if (Properties::getRenderPipelineType() != RenderPipelineType::OpenGL) {
+        //Extensions class is used only by OpenGL pipeline
+        //The code below will crash for SkiaVulkan, because OpenGL is not initialized
+        //TODO: instantiate Extensions class only for OpenGL pipeline
+        return;
+    }
     const char* version = (const char*) glGetString(GL_VERSION);
 
     // Section 6.1.5 of the OpenGL ES specification indicates the GL version

libs/hwui/pipeline/skia/SkiaOpenGLReadback.cpp

@@ -73,7 +73,7 @@ CopyResult SkiaOpenGLReadback::copyImageInto(EGLImageKHR eglImage, const Matrix4
      * for reading back float buffers (skbug.com/6945).
      */
     if (pixelConfig == kRGBA_half_GrPixelConfig &&
-            !DeviceInfo::get()->extensions().hasFloatTextures()) {
+            !grContext->caps()->isConfigTexturable(kRGBA_half_GrPixelConfig)) {
         ALOGW("Can't copy surface into bitmap, RGBA_F16 config is not supported");
         return CopyResult::DestinationInvalid;
     }