Convert gralloc.default to soong

Convert hardware/libhardware/Android.mk to Android.bp and due to the if
condition for GRALLOC_FRAMEBUFFER_NUM is never being used, remove the if
condition for the converted Android.bp.

Bug: 356533884
Test: m gralloc.default

Change-Id: I99dc7c4e203fd743b3d64b2d98fd9231297ea076
diff --git a/modules/gralloc/Android.bp b/modules/gralloc/Android.bp
new file mode 100644
index 0000000..e352c80
--- /dev/null
+++ b/modules/gralloc/Android.bp
@@ -0,0 +1,45 @@
+// Copyright (C) 2008 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// HAL module implementation stored in
+// hw/<OVERLAY_HARDWARE_MODULE_ID>.<ro.product.board>.so
+package {
+    // See: http://go/android-license-faq
+    default_applicable_licenses: [
+        "hardware_libhardware_license",
+    ],
+}
+
+cc_library_shared {
+    name: "gralloc.default",
+    relative_install_path: "hw",
+    proprietary: true,
+    shared_libs: [
+        "liblog",
+        "libcutils",
+    ],
+    srcs: [
+        "gralloc.cpp",
+        "framebuffer.cpp",
+        "mapper.cpp",
+    ],
+    header_libs: ["libhardware_headers"],
+    cflags: [
+        "-DLOG_TAG=\"gralloc\"",
+        "-Wno-missing-field-initializers",
+    ] + select(soong_config_variable("gralloc", "target_use_pan_display"), {
+        true: ["-DUSE_PAN_DISPLAY=1"],
+        default: [],
+    }),
+}