Use GraphicBuffer instead of GBP for screenshots.

Migrate screenshot code to render the layers into a
GraphicBuffer instead of creating a GraphicBufferProducer. This cleans
up the code and makes rendering a screen capture simpler and clearer.

Test: Screencaptures for Recents, manual screenshots, and "adb shell
screencap"
Test: Transaction_test

Change-Id: Ifb463c0e98cfaa3f96ad27837b1a2e2921e253d1
diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index e939383..80216bc 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -1760,4 +1760,25 @@
     return OK;
 }
 
+status_t Surface::attachAndQueueBuffer(Surface* surface, sp<GraphicBuffer> buffer) {
+    if (buffer == nullptr) {
+        return BAD_VALUE;
+    }
+    int err = static_cast<ANativeWindow*>(surface)->perform(surface, NATIVE_WINDOW_API_CONNECT,
+                                                            NATIVE_WINDOW_API_CPU);
+    if (err != OK) {
+        return err;
+    }
+    err = surface->attachBuffer(buffer->getNativeBuffer());
+    if (err != OK) {
+        return err;
+    }
+    err = static_cast<ANativeWindow*>(surface)->queueBuffer(surface, buffer->getNativeBuffer(), -1);
+    if (err != OK) {
+        return err;
+    }
+    err = surface->disconnect(NATIVE_WINDOW_API_CPU);
+    return err;
+}
+
 }; // namespace android