Use @android:style/Theme.Black.NoTitleBar to avoid white flash

sky/sdk/example/demo_launcher/apk/AndroidManifest.xml

Index: sky/sdk/example/demo_launcher/apk/AndroidManifest.xml
diff --git a/sky/sdk/example/demo_launcher/apk/AndroidManifest.xml b/sky/sdk/example/demo_launcher/apk/AndroidManifest.xml
index b09650d28cc49c46ff94c286321c1d6eb27a6874..fa161633d15bada0ae720a21c92dbb6e86c71861 100644
--- a/sky/sdk/example/demo_launcher/apk/AndroidManifest.xml
+++ b/sky/sdk/example/demo_launcher/apk/AndroidManifest.xml
@@ -10,11 +10,11 @@
     <uses-feature android:name="android.hardware.sensor.accelerometer" android:required="true" />
 
     <application android:icon="@mipmap/ic_launcher" android:label="Sky" android:name="SkyDemoApplication">
-        <activity android:configChanges="orientation|keyboardHidden|keyboard|screenSize" android:documentLaunchMode="always" android:hardwareAccelerated="true" android:launchMode="standard" android:name="SkyDemoActivity" android:theme="@android:style/Theme.Holo.Light.NoActionBar">
+        <activity android:configChanges="orientation|keyboardHidden|keyboard|screenSize" android:documentLaunchMode="always" android:hardwareAccelerated="true" android:launchMode="standard" android:name="SkyDemoActivity" android:theme="@android:style/Theme.Black.NoTitleBar">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
     </application>
- </manifest>
+ </manifest>