Fix layout mirroring.

Change-Id: I7db398aa2d11dac1210e84922138f78f0c23bb9b
diff --git a/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/Layout.java b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/Layout.java
index c72c979..cbd0415 100644
--- a/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/Layout.java
+++ b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/Layout.java
@@ -131,6 +131,7 @@
         HardwareConfig hwConfig = getParams().getHardwareConfig();
         Density density = hwConfig.getDensity();
         boolean isRtl = Bridge.isLocaleRtl(getParams().getLocale());
+        setLayoutDirection(isRtl? LAYOUT_DIRECTION_RTL : LAYOUT_DIRECTION_LTR);
 
         NavigationBar navBar = null;
         if (mBuilder.hasNavBar()) {