Android benchmark frame time (#1958)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Bart Louwers <bart@emeel.net>

platform/default/include/mbgl/gfx/headless_backend.hpp

@@ -15,11 +15,6 @@ namespace gfx {
 // of readStillImage.
 class HeadlessBackend : public gfx::Renderable {
 public:
-    enum class SwapBehaviour {
-        NoFlush,
-        Flush
-    };
-
     // Factory.
     static std::unique_ptr<HeadlessBackend> Create(const Size size = {256, 256},
                                                    SwapBehaviour swapBehavior = SwapBehaviour::NoFlush,

platform/default/src/mbgl/gl/headless_backend.cpp

@@ -111,7 +111,7 @@ namespace gfx {
 
 template <>
 std::unique_ptr<gfx::HeadlessBackend> Backend::Create<gfx::Backend::Type::OpenGL>(
-    const Size size, gfx::HeadlessBackend::SwapBehaviour swapBehavior, const gfx::ContextMode contextMode) {
+    const Size size, gfx::Renderable::SwapBehaviour swapBehavior, const gfx::ContextMode contextMode) {
     return std::make_unique<gl::HeadlessBackend>(size, swapBehavior, contextMode);
 }