Make HWUI build for macOs

Only use AnimatedImageThread on Android, it is not currently supported
on host.

Bug: 148525019
Test: on macOs: lunch sdk & m libhwui
Change-Id: I644bc82887fb7e36b2a5e4117ee328a3df99a0d4
diff --git a/libs/hwui/Android.bp b/libs/hwui/Android.bp
index 51270f5..2ec7ceb 100644
--- a/libs/hwui/Android.bp
+++ b/libs/hwui/Android.bp
@@ -168,7 +168,6 @@
         "renderthread/RenderTask.cpp",
         "renderthread/TimeLord.cpp",
         "hwui/AnimatedImageDrawable.cpp",
-        "hwui/AnimatedImageThread.cpp",
         "hwui/Bitmap.cpp",
         "hwui/Canvas.cpp",
         "hwui/ImageDecoder.cpp",
@@ -210,6 +209,7 @@
         android: {
 
             srcs: [
+                "hwui/AnimatedImageThread.cpp",
                 "pipeline/skia/ATraceMemoryDump.cpp",
                 "pipeline/skia/GLFunctorDrawable.cpp",
                 "pipeline/skia/LayerDrawable.cpp",