Add xml attributes to Toolbar for navigation icon

...to match the existing setters/getters.

Change-Id: I9814c5d7f2aa0559c93fbb74881e29064473f186

api/current.txt

@@ -905,6 +905,8 @@ package android {
     field public static final int multiprocess = 16842771; // 0x1010013
     field public static final int name = 16842755; // 0x1010003
     field public static final int navigationBarColor = 16843858; // 0x1010452
+    field public static final int navigationContentDescription = 16843970; // 0x10104c2
+    field public static final int navigationIcon = 16843969; // 0x10104c1
     field public static final int navigationMode = 16843471; // 0x10102cf
     field public static final int negativeButtonText = 16843254; // 0x10101f6
     field public static final int nestedScrollingEnabled = 16843830; // 0x1010436

core/java/android/widget/Toolbar.java

@@ -244,6 +244,16 @@ public class Toolbar extends ViewGroup {
         // Set the default context, since setPopupTheme() may be a no-op.
         mPopupContext = mContext;
         setPopupTheme(a.getResourceId(R.styleable.Toolbar_popupTheme, 0));
+
+        final Drawable navIcon = a.getDrawable(R.styleable.Toolbar_navigationIcon);
+        if (navIcon != null) {
+            setNavigationIcon(navIcon);
+            final CharSequence navDesc = a.getText(
+                    R.styleable.Toolbar_navigationContentDescription);
+            if (!TextUtils.isEmpty(navDesc)) {
+                setNavigationContentDescription(navDesc);
+            }
+        }
         a.recycle();
     }
 

core/res/res/values/attrs.xml

@@ -7322,6 +7322,8 @@
         <!-- Reference to a theme that should be used to inflate popups
              shown by widgets in the toolbar. -->
         <attr name="popupTheme" format="reference" />
+        <attr name="navigationIcon" format="reference" />
+        <attr name="navigationContentDescription" format="string|reference" />
     </declare-styleable>
 
     <declare-styleable name="Toolbar_LayoutParams">

core/res/res/values/public.xml

@@ -2280,6 +2280,8 @@
   <public type="attr" name="reparentWithOverlay" />
   <public type="attr" name="ambientShadowAlpha" />
   <public type="attr" name="spotShadowAlpha" />
+  <public type="attr" name="navigationIcon" />
+  <public type="attr" name="navigationContentDescription" />
 
   <public-padding type="dimen" name="l_resource_pad" end="0x01050010" />