title: Where is this top border in Theme.Light.NoTitleBar coming from?
body: <p>I have the following application.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.currency.mobile.android"&gt;
      &lt;uses-permission android:name="android.permission.INTERNET"/&gt;
      &lt;application android:icon="@drawable/icon" android:label="@string/app_name"
                   android:theme="@android:style/Theme.Light.NoTitleBar"&gt;
  
          &lt;activity android:name=".MainActivity" android:noHistory="true"&gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN"/&gt;
                  &lt;category android:name="android.intent.category.LAUNCHER"/&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
  
          &lt;activity android:name=".LoginActivity"/&gt;
          &lt;activity android:name=".HomeActivity" /&gt;
          &lt;activity android:name=".FriendsActivity"/&gt;
          &lt;activity android:name=".PlacesActivity"/&gt;
          &lt;activity android:name=".ProfileActivity"/&gt;
          &lt;activity android:name=".PurchasesActivity"/&gt;
      &lt;/application&gt;
  &lt;/manifest&gt;
  </code></pre>
  
  <p>This is my tab view:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;TabHost xmlns:android="http://schemas.android.com/apk/res/android"
           android:id="@android:id/tabhost"
           android:layout_width="fill_parent"
           android:layout_height="fill_parent"&gt;
      &lt;LinearLayout
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:padding="5dp"&gt;
          &lt;TabWidget
                  android:id="@android:id/tabs"
                  android:layout_width="fill_parent"
                  android:layout_height="wrap_content"/&gt;
          &lt;FrameLayout
                  android:id="@android:id/tabcontent"
                  android:layout_width="fill_parent"
                  android:layout_height="fill_parent"
                  android:padding="5dp"/&gt;
      &lt;/LinearLayout&gt;
  &lt;/TabHost&gt;
  </code></pre>
  
  <p>When using Theme.Light.NoTitleBar I get this ugly line in the middle:</p>
  
  <p><img src="https://i.stack.imgur.com/nVA0j.png" alt="alt text"></p>
  
  <p>But when I use Theme.Black it doesn't have such a weird line. Any way to fix it so that I can use light theme? </p>