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/ueventd_parser.cpp b/init/ueventd_parser.cpp
index 7156e76..02e0d42 100644
--- a/init/ueventd_parser.cpp
+++ b/init/ueventd_parser.cpp
@@ -21,6 +21,9 @@
 
 #include "keyword_map.h"
 
+namespace android {
+namespace init {
+
 bool ParsePermissionsLine(std::vector<std::string>&& args, std::string* err,
                           std::vector<SysfsPermissions>* out_sysfs_permissions,
                           std::vector<Permissions>* out_dev_permissions) {
@@ -143,3 +146,6 @@
 void SubsystemParser::EndSection() {
     subsystems_->emplace_back(std::move(subsystem_));
 }
+
+}  // namespace init
+}  // namespace android