Update Android port

* java/AndroidManifest.xml.in: Exclude non-files from opening in
Emacs.

* java/org/gnu/emacs/EmacsOpenActivity.java (onCreate): Avert
crash should scheme be NULL.

java/AndroidManifest.xml.in

@@ -110,7 +110,10 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>. -->
 	<action android:name="android.intent.action.EDIT"/>
 	<action android:name="android.intent.action.PICK"/>
         <category android:name="android.intent.category.DEFAULT"/>
-	<data android:mimeType="*/*"/>
+	<!-- Don't offer to start Emacs for URLs that designate
+	     resources other than files.  -->
+	<data android:mimeType="*/*" android:scheme="file"/>
+	<data android:mimeType="*/*" android:scheme="content"/>
       </intent-filter>
 
       <!-- Facilitate opening org-protocol:// URLs as well, the same

java/org/gnu/emacs/EmacsOpenActivity.java

@@ -438,6 +438,12 @@ private class EmacsClientThread extends Thread
 
 	scheme = uri.getScheme ();
 
+	/* It is possible for scheme to be NULL, under Android 2.3 at
+	   least.  */
+
+	if (scheme == null)
+	  return;
+
 	/* If URL is a mailto URI, call `message-mailto' much the same
 	   way emacsclient-mail.desktop does.  */