Move android::hidl to android::hardware.

Also moved Status and PersistableBundle out of their
respective 'binder' and 'os' namespaces.

Bug: 30507513
Change-Id: I8822070049a9c1b1b89753aaeb148b05b2aa851d

IPCThreadState.cpp

diff --git a/IPCThreadState.cpp b/IPCThreadState.cpp
index 6e759ad..4b56fce 100644
--- a/IPCThreadState.cpp
+++ b/IPCThreadState.cpp
@@ -63,7 +63,7 @@
 // ---------------------------------------------------------------------------
 
 namespace android {
-namespace hidl {
+namespace hardware {
 
 static const char* getReturnString(size_t idx);
 static const void* printReturnCommand(TextOutput& out, const void* _cmd);
@@ -1234,5 +1234,5 @@
     state->mOut.writePointer((uintptr_t)data);
 }
 
-}; // namespace hidl
+}; // namespace hardware
 }; // namespace android