Update permissions UI to match new watch UI.

<?xml version="1.0" encoding="utf-8"?>

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<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_enabled="false"

            android:alpha="?android:disabledAlpha"

            android:color="?android:colorButtonNormal" />

    <item android:color="?android:colorAccent" />

</selector>