libprocessgroup: Move CgroupSetupCgroups() to libprocessgroup_setup

Only init uses SetupCgroups. This functionality is
moved from libprocessgroup to its own library, and only
init links to it.

Also, merge CgroupSetupCgroups() with CgroupMap::SetupCgroups()
because the former is just an alias of the latter, and
CgroupMap does not belong to libcgrouprc_setup.

Test: boots
Bug: 123664216
Change-Id: I941dc0c415e2b22ae663d43e30dc7a464687325e
Merged-In: I941dc0c415e2b22ae663d43e30dc7a464687325e
diff --git a/libprocessgroup/setup/Android.bp b/libprocessgroup/setup/Android.bp
new file mode 100644
index 0000000..a403a23
--- /dev/null
+++ b/libprocessgroup/setup/Android.bp
@@ -0,0 +1,41 @@
+//
+// Copyright (C) 2019 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.
+//
+
+cc_library_shared {
+    name: "libprocessgroup_setup",
+    recovery_available: true,
+    srcs: [
+        "cgroup_map_write.cpp",
+    ],
+    export_include_dirs: [
+        "include",
+    ],
+    shared_libs: [
+        "libbase",
+        "libprocessgroup",
+        "libjsoncpp",
+    ],
+    header_libs: [
+        "libprocessgroup_headers",
+    ],
+    export_header_lib_headers: [
+        "libprocessgroup_headers",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+}