init: create android::init:: namespace

With some small fixups along the way

Test: Boot bullhead
Test: init unit tests
Change-Id: I7beaa473cfa9397f845f810557d1631b4a462d6a
diff --git a/init/util.h b/init/util.h
index 1ad6b77..346953f 100644
--- a/init/util.h
+++ b/init/util.h
@@ -35,6 +35,9 @@
 using android::base::boot_clock;
 using namespace std::chrono_literals;
 
+namespace android {
+namespace init {
+
 int CreateSocket(const char* name, int type, bool passcred, mode_t perm, uid_t uid, gid_t gid,
                  const char* socketcon, selabel_handle* sehandle);
 
@@ -78,4 +81,7 @@
 bool read_android_dt_file(const std::string& sub_path, std::string* dt_content);
 bool is_android_dt_value_expected(const std::string& sub_path, const std::string& expected_content);
 
+}  // namespace init
+}  // namespace android
+
 #endif