[TIMOB-6783] Android: AndroidManifest - V8 and Rhino, modifying custom AndroidManifest does not copy to real AndroidManifest during build time

Steps to reproduce: 1. Create a TiMob project and launch to Android emulator 2. Copy AndroidManifest.xml from *build* folder and add it to *platform > android* (platform folder is the same level as resources) 3. In the AndroidManifest.xml, modify the TiActivity tag to the following:

<activity android:name="org.appcelerator.titanium.TiActivity"
			android:screenOrientation="portrait"
			android:configChanges="keyboardHidden" />

4. Clean and run Results: The AndroidManifest.xml in the build folder still contains:

<activity android:name="org.appcelerator.titanium.TiActivity"
			android:configChanges="keyboardHidden|orientation" />

5. You get the same results if you changed only the TiTabActivity to:

<activity android:name="ti.modules.titanium.ui.TiTabActivity"
                        android:screenOrientation="portrait"
			android:configChanges="keyboardHidden" />

6. But, if both tags from step 3 and 5 are changed accordingly, then the tags get copied to the AndroidManifest in the build folder Expected: Changes to the custom AndroidManifest should be reflected in the AndroidManifest in the build folder