libgui: Format BitTube and move into gui namespace

Reformats BitTube using the framework default .clang-format and moves
it into the android::gui namespace.

Test: m -j + manual testing
Change-Id: I5ea748b809f37c2ec4dcfb41e7b84daf7a084368
diff --git a/services/surfaceflinger/EventThread.cpp b/services/surfaceflinger/EventThread.cpp
index 463e60c..7e0506b 100644
--- a/services/surfaceflinger/EventThread.cpp
+++ b/services/surfaceflinger/EventThread.cpp
@@ -389,7 +389,7 @@
 
 EventThread::Connection::Connection(
         const sp<EventThread>& eventThread)
-    : count(-1), mEventThread(eventThread), mChannel(new BitTube())
+    : count(-1), mEventThread(eventThread), mChannel(new gui::BitTube())
 {
 }
 
@@ -403,7 +403,7 @@
     mEventThread->registerDisplayEventConnection(this);
 }
 
-status_t EventThread::Connection::getDataChannel(sp<BitTube>* outChannel) const {
+status_t EventThread::Connection::getDataChannel(sp<gui::BitTube>* outChannel) const {
     *outChannel = mChannel;
     return NO_ERROR;
 }