[TIMOB-19629] Use application theme as parent for Theme.Titanium

[garymathews]

• When an application theme is defined in tiapp.xml make sure the parent of Theme.Titanium is set as this theme

TEST CASE

tiapp.xml

...
<android xmlns:android="http://schemas.android.com/apk/res/android">
    <manifest android:versionCode="1" android:versionName="1.0">
        <application android:theme="@style/Theme.Test"/>
    </manifest>
</android>
...

platform/android/res/values/test.xml

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:android="http://schemas.android.com/apk/res/android">
    <style name="Theme.Test" parent="@style/Theme.AppCompat">
        <item name="android:textAllCaps">false</item>
    </style>
</resources>

app.js

var win = Ti.UI.createWindow(),
	btn = Ti.UI.createButton({title: 'lower case'}),
	lv = Ti.UI.createListView();

lv.appendSection(Ti.UI.createListSection({
	headerView: btn
}));
win.add(lv);
win.open();

For Android 5.0+, the lower case title of the button should NOT be uppercase.

JIRA Ticket