android: remove attrs.xml

Change-Id: I7d3742af0c11a996701f7d263fc04a387edb0d00
(cherry picked from commit b0166b1d)

android/source/res/values/attrs.xml

-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<resources>
-
-    <declare-styleable name="TextSelectionHandle">
-        <attr name="handleType">
-            <flag name="start" value="0x01"/>
-            <flag name="middle" value="0x02"/>
-            <flag name="end" value="0x03"/>
-        </attr>
-    </declare-styleable>
-
-</resources>
-