QMediaPlayer does not allow clients to set Access Point

Currently if Client is using QMediaPlayer for Streaming Audio/Video files, it just passes the URI but it cannot set access point to use. so symbian backend will use the default access point setting used by Helix.

Qt provides a way to do this via QNetwork Manager, we need something similar in QT Mobility side
NOTE: This issue was discovered when a client using Phonon API in Symbian wanted to use wirelessLAN but because Phonon does not provide a way to set access point, the default 3G Access point
for helix was used.

This API requires Qt 4.7.x Bearer API.