GraphicsEnv is separated from libui

GraphicsEnv class is separated from libui in order to make libui VNDK.
The class is then built as a standalone library named
'libgraphicsenv.so'. Clients that were using the GraphicsEnv class are
also updated to reference the new library.

Bug: 38097618
Test: sailfish builds and boots

Change-Id: I4c35fdff0e92453b98ea21136ef0f99fab01b6f8
diff --git a/libs/ui/Android.bp b/libs/ui/Android.bp
index ab48a7f..452f529 100644
--- a/libs/ui/Android.bp
+++ b/libs/ui/Android.bp
@@ -53,7 +53,6 @@
         "GraphicBuffer.cpp",
         "GraphicBufferAllocator.cpp",
         "GraphicBufferMapper.cpp",
-        "GraphicsEnv.cpp",
         "HdrCapabilities.cpp",
         "PixelFormat.cpp",
         "Rect.cpp",
@@ -67,7 +66,6 @@
         "android.hardware.configstore@1.0",
         "android.hardware.configstore-utils",
         "libbase",
-        "libnativeloader",
         "libcutils",
         "libhardware",
         "libhidlbase",
@@ -75,6 +73,7 @@
         "libsync",
         "libutils",
         "liblog",
+        "libgraphicsenv",
     ],
 
     static_libs: [
diff --git a/libs/ui/GraphicsEnv.cpp b/libs/ui/GraphicsEnv.cpp
deleted file mode 100644
index 1d20424..0000000
--- a/libs/ui/GraphicsEnv.cpp
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * Copyright 2017 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.
- */
-
-//#define LOG_NDEBUG 1
-#define LOG_TAG "GraphicsEnv"
-#include <ui/GraphicsEnv.h>
-
-#include <mutex>
-
-#include <log/log.h>
-#include <nativeloader/dlext_namespaces.h>
-
-namespace android {
-
-/*static*/ GraphicsEnv& GraphicsEnv::getInstance() {
-    static GraphicsEnv env;
-    return env;
-}
-
-void GraphicsEnv::setDriverPath(const std::string path) {
-    if (!mDriverPath.empty()) {
-        ALOGV("ignoring attempt to change driver path from '%s' to '%s'",
-                mDriverPath.c_str(), path.c_str());
-        return;
-    }
-    ALOGV("setting driver path to '%s'", path.c_str());
-    mDriverPath = path;
-}
-
-android_namespace_t* GraphicsEnv::getDriverNamespace() {
-    static std::once_flag once;
-    std::call_once(once, [this]() {
-        // TODO; In the next version of Android, all graphics drivers will be
-        // loaded into a custom namespace. To minimize risk for this release,
-        // only updated drivers use a custom namespace.
-        //
-        // Additionally, the custom namespace will be
-        // ANDROID_NAMESPACE_TYPE_ISOLATED, and will only have access to a
-        // subset of the system.
-        if (mDriverPath.empty())
-            return;
-
-        char defaultPath[PATH_MAX];
-        android_get_LD_LIBRARY_PATH(defaultPath, sizeof(defaultPath));
-        size_t defaultPathLen = strlen(defaultPath);
-
-        std::string path;
-        path.reserve(mDriverPath.size() + 1 + defaultPathLen);
-        path.append(mDriverPath);
-        path.push_back(':');
-        path.append(defaultPath, defaultPathLen);
-
-        mDriverNamespace = android_create_namespace(
-                "gfx driver",
-                nullptr,                    // ld_library_path
-                path.c_str(),               // default_library_path
-                ANDROID_NAMESPACE_TYPE_SHARED,
-                nullptr,                    // permitted_when_isolated_path
-                nullptr);                   // parent
-    });
-    return mDriverNamespace;
-}
-
-} // namespace android
-
-extern "C" android_namespace_t* android_getDriverNamespace() {
-    return android::GraphicsEnv::getInstance().getDriverNamespace();
-}