Update android.jar classpath for Android O support.

tools/android/eclipse/.classpath

Index: tools/android/eclipse/.classpath
diff --git a/tools/android/eclipse/.classpath b/tools/android/eclipse/.classpath
index 9722d0f469a5b1e64fa9966cdc35c13ad2036aeb..5c657c0dbf3faa305aabdf197627d872edb159e6 100644
--- a/tools/android/eclipse/.classpath
+++ b/tools/android/eclipse/.classpath
@@ -226,7 +226,7 @@ to the classpath for downstream development. See "additional_entries" below.
     <classpathentry kind="src" path="out/Debug/remoting_apk/gen"/>
     <classpathentry kind="src" path="out/Debug/webview_instrumentation_test_apk/gen"/>
     <classpathentry kind="lib" path="third_party/android_tools/sdk/extras/google/gcm/gcm-client/dist/gcm.jar" sourcepath="third_party/android_tools/sdk/extras/google/gcm/gcm-client/src"/>
-    <classpathentry kind="lib" path="third_party/android_tools/sdk/platforms/android-25/android.jar" sourcepath="third_party/android_tools/sdk/sources/">
+    <classpathentry kind="lib" path="third_party/android_tools/sdk/platforms/android-26/android.jar" sourcepath="third_party/android_tools/sdk/sources/">
         <attributes>
             <attribute name="javadoc_location" value="http://developer.android.com/reference/"/>
         </attributes>