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/init_parser.h b/init/init_parser.h
index 722ebb2..c07a699 100644
--- a/init/init_parser.h
+++ b/init/init_parser.h
@@ -45,6 +45,9 @@
 //    This function is called at the end of the file.
 //    It indicates that the parsing has completed and any relevant objects should be committed.
 
+namespace android {
+namespace init {
+
 class SectionParser {
   public:
     virtual ~SectionParser() {}
@@ -93,4 +96,7 @@
     bool is_odm_etc_init_loaded_ = false;
 };
 
+}  // namespace init
+}  // namespace android
+
 #endif