Replace keyboard hide PNGs with a vector drawable.

res/drawable/ic_keyboard_hide_36dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="36dp" android:tint="?attr/colorControlNormal"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="36dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M20,3L4,3c-1.1,0 -1.99,0.9 -1.99,2L2,15c0,1.1 0.9,2 2,2h16c1.1,0 2,-0.9 2,-2L22,5c0,-1.1 -0.9,-2 -2,-2zM11,6h2v2h-2L11,6zM11,9h2v2h-2L11,9zM8,6h2v2L8,8L8,6zM8,9h2v2L8,11L8,9zM7,11L5,11L5,9h2v2zM7,8L5,8L5,6h2v2zM16,15L8,15v-2h8v2zM16,11h-2L14,9h2v2zM16,8h-2L14,6h2v2zM19,11h-2L17,9h2v2zM19,8h-2L17,6h2v2zM12,23l4,-4L8,19l4,4z"/>
+</vector>

res/xml/remotekeyboardplugin_keyboard.xml

@@ -7,7 +7,7 @@
     <Row android:rowEdgeFlags="bottom">
         <Key
             android:codes="0"
-            android:keyIcon="@drawable/ic_keyboard_hide_white_36dp"
+            android:keyIcon="@drawable/ic_keyboard_hide_36dp"
             android:keyWidth="20%" />
         <Key
             android:codes="1"