[TIMOB-8200] Android: webViews has a white background when turning on hardware acceleration

var win = Ti.UI.createWindow({
	backgroundImage : 'KS_nav_ui.png', //'/images/guide_fond_notice.png',
	navBarHidden : true,
	exitOnClose : true,
	top : '0dp',
	left : '0dp',
	right : '0dp',
	bottom : '0dp'
});

var webView = Ti.UI.createWebView({
	backgroundColor : 'transparent',
	html : 'This WebView\'s Background Must Be transparent',
	top : '50dp',
	left : '470dp',
	right : '0dp',
	bottom : '50dp'
});
win.add(webView);

win.open(); 

<?xml version="1.0" encoding="UTF-8"?>
<ti:app xmlns:ti="http://ti.appcelerator.org">
    <property name="ti.android.runtime">v8</property>
    <deployment-targets>
        <target device="mobileweb">true</target>
        <target device="iphone">true</target>
        <target device="ipad">true</target>
        <target device="android">true</target>
        <target device="blackberry">false</target>
    </deployment-targets>
    <sdk-version>1.8.2</sdk-version>
    <id>com.appcelerator.com</id>
    <name>AcScreenConfs</name>
    <version>1.0</version>
    <publisher>egomez</publisher>
    <url>http://</url>
    <description>not specified</description>
    <copyright>2012 by egomez</copyright>
    <icon>appicon.png</icon>
    <persistent-wifi>false</persistent-wifi>
    <prerendered-icon>false</prerendered-icon>
    <statusbar-style>default</statusbar-style>
    <statusbar-hidden>false</statusbar-hidden>
    <fullscreen>false</fullscreen>
    <navbar-hidden>false</navbar-hidden>
    <analytics>true</analytics>
    <guid>95f32b4c-0c20-4f0e-86d5-3bc8ece20641</guid>
    <iphone>
        <orientations device="iphone">
            <orientation>Ti.UI.PORTRAIT</orientation>
        </orientations>
        <orientations device="ipad">
            <orientation>Ti.UI.PORTRAIT</orientation>
            <orientation>Ti.UI.UPSIDE_PORTRAIT</orientation>
            <orientation>Ti.UI.LANDSCAPE_LEFT</orientation>
            <orientation>Ti.UI.LANDSCAPE_RIGHT</orientation>
        </orientations>
    </iphone>
    <android xmlns:android="http://schemas.android.com/apk/res/android">
   <tool-api-level>11</tool-api-level>
        <manifest>
            <supports-screens android:anyDensity="true" />
            <uses-sdk android:minSdkVersion="11" android:targetSdkVersion="11"/>
            <application android:hardwareAccelerated="true">
                <activity
                    android:configChanges="keyboardHidden|orientation"
                    android:name=".TestActivity" android:theme="@android:style/Theme.Holo.Wallpaper.NoTitleBar">
                    <intent-filter>
                        <action android:name="android.intent.action.MAIN" />
                        <category android:name="android.intent.category.LAUNCHER" />
                    </intent-filter>
                </activity>
            </application>
        </manifest>
    </android>
    <modules/>
</ti:app>

<?xml version="1.0"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1" 
               package="com.appcelerator.com" android:installLocation="preferExternal">
   <tool-api-level>11</tool-api-level>
	<uses-sdk android:minSdkVersion="7" android:targetSdkVersion="11"/>

<supports-screens android:anyDensity="true" android:largeScreens="true" android:normalScreens="true" android:smallScreens="false"/>

  <application android:hardwareAccelerated="true" android:debuggable="true" android:name="ActifryApplication">

    <activity android:configChanges="keyboardHidden|orientation" android:screenOrientation="portrait" android:name=".ActifryActivity" android:theme="@style/Theme.Titanium">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>

    <!-- TI_APPLICATION -->

    <activity android:configChanges="keyboardHidden|orientation" android:launchMode="singleTask" android:name="ti.modules.titanium.media.TiVideoActivity" android:theme="@android:style/Theme.NoTitleBar.Fullscreen"/>

    <activity android:configChanges="keyboardHidden|orientation" android:name="org.appcelerator.titanium.TiActivity"/>
    <activity android:configChanges="keyboardHidden|orientation" android:name="org.appcelerator.titanium.TiTranslucentActivity" android:theme="@android:style/Theme.Translucent"/>
    <activity android:configChanges="keyboardHidden|orientation" android:name="org.appcelerator.titanium.TiModalActivity" android:theme="@android:style/Theme.Translucent"/>
    <activity android:configChanges="keyboardHidden|orientation" android:name="ti.modules.titanium.ui.TiTabActivity"/>
    <activity android:name="ti.modules.titanium.ui.android.TiPreferencesActivity"/>

    <service android:exported="false" android:name="org.appcelerator.titanium.analytics.TiAnalyticsService"/>


</application>

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.INTERNET"/>

</manifest>