gpu: Use ANDROID_native_fence_sync instead of ARM_implicit_external_sync.

cc/output/direct_renderer.cc

Index: cc/output/direct_renderer.cc
diff --git a/cc/output/direct_renderer.cc b/cc/output/direct_renderer.cc
index b97dec844b74a91eda2f5a96c5dce6fe0e246cb0..f803ffb724bc575660babc3e2145a40914b66859 100644
--- a/cc/output/direct_renderer.cc
+++ b/cc/output/direct_renderer.cc
@@ -97,10 +97,6 @@ void DirectRenderer::Initialize() {
       allow_empty_swap_ = true;
     if (context_provider->ContextCapabilities().dc_layers)
       supports_dc_layers_ = true;
-    if (context_provider->ContextCapabilities()
-            .disable_non_empty_post_sub_buffers) {
-      use_partial_swap_ = false;
-    }
   }
 
   initialized_ = true;