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/uevent.h b/init/uevent.h
index 1095665..c4fd945 100644
--- a/init/uevent.h
+++ b/init/uevent.h
@@ -19,6 +19,9 @@
 
 #include <string>
 
+namespace android {
+namespace init {
+
 struct Uevent {
     std::string action;
     std::string path;
@@ -31,4 +34,7 @@
     int minor;
 };
 
+}  // namespace init
+}  // namespace android
+
 #endif