graphics: rewrite libgralloc1-adapter

Rewrite libgralloc1-adapter to be based on Gralloc1On0Adapter.
Previously, the adapter targeted maximum portability and maximum
performance.  The rewritten adapter targets ease of use instead.

This also fixes a bug in the adapter's GRALLOC1_FUNCTION_RELEASE.  The
function does not imply native_handle_close/native_handle_delete.  As a
result, IMapper and IComposer are also fixed to close/delete handles.

Test: builds and boots
Change-Id: I5c071453dc950583087ae07967bca2c22866c538
diff --git a/graphics/allocator/2.0/default/Android.bp b/graphics/allocator/2.0/default/Android.bp
index 994feb3..f0c736c 100644
--- a/graphics/allocator/2.0/default/Android.bp
+++ b/graphics/allocator/2.0/default/Android.bp
@@ -34,7 +34,7 @@
 
 cc_library_static {
     name: "libgralloc1-adapter",
-    srcs: ["gralloc1-adapter.c"],
+    srcs: ["gralloc1-adapter.cpp", "Gralloc1On0Adapter.cpp"],
     include_dirs: ["system/core/libsync/include"],
     cflags: ["-Wall", "-Wextra", "-Wno-unused-parameter"],
     export_include_dirs: ["."],