Move FloatRect from libgfx to libui

Moves FloatRect from libgfx (which is being disintegrated) to libui

Test: Builds and sailfish boots
Change-Id: I68c1b7d86a363066fe4d6f0c038ca9d92d7ab9c7
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.h b/services/surfaceflinger/DisplayHardware/HWC2.h
index 93eb999..e129a3a 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.h
+++ b/services/surfaceflinger/DisplayHardware/HWC2.h
@@ -38,12 +38,10 @@
 
 namespace android {
     class Fence;
+    class FloatRect;
     class GraphicBuffer;
     class Rect;
     class Region;
-    namespace gfx {
-        class FloatRect;
-    }
     namespace Hwc2 {
         class Composer;
     }
@@ -410,7 +408,7 @@
     [[clang::warn_unused_result]] Error setSidebandStream(
             const native_handle_t* stream);
     [[clang::warn_unused_result]] Error setSourceCrop(
-            const android::gfx::FloatRect& crop);
+            const android::FloatRect& crop);
     [[clang::warn_unused_result]] Error setTransform(Transform transform);
     [[clang::warn_unused_result]] Error setVisibleRegion(
             const android::Region& region);