Doc change: small refinement of brand usage guidelines.

    <ul>

    <li>Android&trade; should have a trademark symbol the first time it appears in a creative.</li>

    <li>Android should always be capitalized and is never plural or possessive.</li>

    <li>"Android" by itself cannot be used in the name of an application name or accessory product.

Instead use "for Android."

    <li>"Android" cannot be used in names of applications or accessory products,

    including phones, tablets, TVs, speakers, headphones, watches, and other devices. Instead use "for Android".

      <ul>

        <li><span style="color:red">Incorrect</span>: "Android MediaPlayer"</li>

        <li><span style="color:green">Correct</span>: "MediaPlayer for Android"</li>