Add Navigation Bar to BridgeWindowManager [DO NOT MERGE]

Return the right value for presence of software navigation bar in
BridgeWindowManager. This is required to render the overflow menu button
correctly in the Action Bar.

Change-Id: I73de3b299f6a3a113425c436a59e800cd1d6b97f

tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgeWindowManager.java

@@ -35,11 +35,6 @@ import android.view.IOnKeyguardExitResult;
 import android.view.IRotationWatcher;
 import android.view.IWindowManager;
 import android.view.IWindowSession;
-import android.view.InputChannel;
-import android.view.InputDevice;
-import android.view.InputEvent;
-import android.view.KeyEvent;
-import android.view.MotionEvent;
 
 import java.util.List;
 
@@ -52,6 +47,7 @@ public class BridgeWindowManager implements IWindowManager {
     private final Configuration mConfig;
     private final DisplayMetrics mMetrics;
     private final int mRotation;
+    private boolean mHasNavBar;
 
     public BridgeWindowManager(Configuration config, DisplayMetrics metrics, int rotation) {
         mConfig = config;
@@ -64,6 +60,10 @@ public class BridgeWindowManager implements IWindowManager {
     public DisplayMetrics getMetrics() {
         return mMetrics;
     }
+    
+    public void setHasNavBar(boolean hasNavBar) {
+        mHasNavBar = hasNavBar;
+    }
 
     // ---- implementation of IWindowManager that we care about ----
 
@@ -448,7 +448,7 @@ public class BridgeWindowManager implements IWindowManager {
 
     @Override
     public boolean hasNavigationBar() {
-        return false; // should this return something else?
+        return mHasNavBar;
     }
 
     @Override

tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/RenderSessionImpl.java

@@ -182,6 +182,8 @@ public class RenderSessionImpl extends RenderAction<SessionParams> {
         SessionParams params = getParams();
         BridgeContext context = getContext();
 
+        context.getIWindowManager().setHasNavBar(params.getHardwareConfig().hasSoftwareButtons());
+
         RenderResources resources = getParams().getResources();
         DisplayMetrics metrics = getContext().getMetrics();