Adding workaround to make voice button target area larger (Bug 5653332)

Change-Id: I8c4e940f9ae01ac4f6808ecfb10035249c12a499

src/com/android/launcher2/DrawableStateProxyView.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher2;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.StateListDrawable;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+
+import com.android.launcher.R;
+
+public class DrawableStateProxyView extends LinearLayout {
+
+    private View mView;
+    private int mViewId;
+
+    public DrawableStateProxyView(Context context) {
+        this(context, null);
+    }
+
+    public DrawableStateProxyView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public DrawableStateProxyView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+
+        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.DrawableStateProxyView,
+                defStyle, 0);
+        mViewId = a.getResourceId(R.styleable.DrawableStateProxyView_sourceViewId, -1);
+        a.recycle();
+
+        setFocusable(false);
+    }
+
+    @Override
+    protected void drawableStateChanged() {
+        super.drawableStateChanged();
+
+        if (mView == null) {
+            View parent = (View) getParent();
+            mView = parent.findViewById(mViewId);
+        }
+        mView.setPressed(isPressed());
+        mView.setHovered(isHovered());
+    }
+}