Remove reference to removed xfermodes in hw accel docs

bug:14650725

Also fix color of Picture API level.

Change-Id: Ib3eeaf72dfb81061d13b348d949f6cf1053ec80d

docs/html/guide/topics/graphics/hardware-accel.jd

@@ -284,7 +284,7 @@ changed.</li>
     </tr>
     <tr>
         <td class="label_neg">drawPicture()</td>
-        <td class="value_neg">23</td>
+        <td class="value_pos">23</td>
     </tr>
     <tr>
         <td class="label_pos">drawPosText()</td>
@@ -420,14 +420,6 @@ changed.</li>
     <tr>
         <td colspan="5" class="s5">Xfermode</td>
     </tr>
-    <tr>
-        <td class="label_neg">AvoidXfermode</td>
-        <td class="value_neg">&#10007;</td>
-    </tr>
-    <tr>
-        <td class="label_neg">PixelXorXfermode</td>
-        <td class="value_neg">&#10007;</td>
-    </tr>
     <tr>
         <td class="label_neg">PorterDuff.Mode.DARKEN (framebuffer)</td>
         <td class="value_neg">&#10007;</td>