Extracted some logic to utils_default.cpp in order to make platform specific overriding easier

Test: manual - could install and remove an app. As this is
refactoring there is no need for automated tests.

Change-Id: Ia9321de6699c69fbb7cfa9cf43edde102d56d532
diff --git a/cmds/installd/Android.bp b/cmds/installd/Android.bp
index a6f77aa..37e1646 100644
--- a/cmds/installd/Android.bp
+++ b/cmds/installd/Android.bp
@@ -18,6 +18,7 @@
         "dexopt.cpp",
         "globals.cpp",
         "utils.cpp",
+        "utils_default.cpp",
         "view_compiler.cpp",
         ":installd_aidl",
     ],
@@ -191,6 +192,7 @@
         "globals.cpp",
         "otapreopt.cpp",
         "utils.cpp",
+        "utils_default.cpp",
         "view_compiler.cpp",
     ],
 
diff --git a/cmds/installd/InstalldNativeService.cpp b/cmds/installd/InstalldNativeService.cpp
index 51f30da..cbf0e09 100644
--- a/cmds/installd/InstalldNativeService.cpp
+++ b/cmds/installd/InstalldNativeService.cpp
@@ -2377,7 +2377,7 @@
     if (validate_apk_path(packageDir.c_str())) {
         return error("Invalid path " + packageDir);
     }
-    if (delete_dir_contents_and_dir(packageDir) != 0) {
+    if (rm_package_dir(packageDir) != 0) {
         return error("Failed to delete " + packageDir);
     }
     return ok();
diff --git a/cmds/installd/utils.h b/cmds/installd/utils.h
index 430f515..5afe059 100644
--- a/cmds/installd/utils.h
+++ b/cmds/installd/utils.h
@@ -117,6 +117,8 @@
 
 int delete_dir_contents_fd(int dfd, const char *name);
 
+int rm_package_dir(const std::string& package_dir);
+
 int copy_dir_files(const char *srcname, const char *dstname, uid_t owner, gid_t group);
 
 int64_t data_disk_free(const std::string& data_path);
diff --git a/cmds/installd/utils_default.cpp b/cmds/installd/utils_default.cpp
new file mode 100644
index 0000000..a6025e6
--- /dev/null
+++ b/cmds/installd/utils_default.cpp
@@ -0,0 +1,30 @@
+/*
+** Copyright 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.
+*/
+
+#include "utils.h"
+
+namespace android {
+namespace installd {
+
+// In this file are default definitions of the functions that may contain
+// platform dependent logic.
+
+int rm_package_dir(const std::string& package_dir) {
+    return delete_dir_contents_and_dir(package_dir);
+}
+
+}  // namespace installd
+}  // namespace android