Migrate ISurfaceComposerClient to AIDL

Migrate and clean up ISurfaceComposerClient to aidl, removed the deprecated createWithParent method, removed non used parameters.

Bug: 172002646
Test: atest libgui_test
Change-Id: I8ceb7cd90104f2ad9ca72c8025f6298de1fb1ba0
diff --git a/libs/gui/LayerMetadata.cpp b/libs/gui/LayerMetadata.cpp
index 189d51a..4e12fd3 100644
--- a/libs/gui/LayerMetadata.cpp
+++ b/libs/gui/LayerMetadata.cpp
@@ -23,7 +23,7 @@
 
 using android::base::StringPrintf;
 
-namespace android {
+namespace android::gui {
 
 LayerMetadata::LayerMetadata() = default;
 
@@ -144,4 +144,4 @@
     }
 }
 
-} // namespace android
+} // namespace android::gui