Add MinVersion restriction to SetSelection.

I forgot to add it in crrev.com/c/1362778.

Bug: 908800
Change-Id: I2c6b91261cbbaa6f542556f10d5e12c11be95ca2
Reviewed-on: https://chromium-review.googlesource.com/c/1378152
Reviewed-by: Mattias Nissler <mnissler@chromium.org>
Commit-Queue: Yuichiro Hanada <yhanada@chromium.org>
Cr-Commit-Position: refs/heads/master@{#617324}

components/arc/common/input_method_manager.mojom

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Next MinVersion: 5
+// Next MinVersion: 6
 
 module arc.mojom;
 
@@ -58,7 +58,7 @@ struct TextInputState {
 // It is generated for each focused text field and passed to Android.
 // This interface will be closed when the focus moves to another text field.
 //
-// Next method ID: 5
+// Next method ID: 6
 [MinVersion=2]
 interface InputConnection {
   // Commits text to the focused text field and set the new cursor position.
@@ -83,7 +83,7 @@ interface InputConnection {
                      [MinVersion=3] Range? new_selection_range);
 
   // Selects the given UTF-16 based character range.
-  SetSelection@5(Range new_selection_range);
+  [MinVersion=5] SetSelection@5(Range new_selection_range);
 };
 
 // This interface is called by container when Android's InputMethodManager state