Change group to net_bt_stack

Change-Id: Ifc80fe16cefc8766255cf585acf622beb730f130
Remove stock offmode charging blobs

 * We're using the open source charger now.

Change-Id: Iff0b5f0f1f9ea6908801a2dd1af2fed6b6a259b0
Add libI420colorconvert.so to proprietary extract list

 * The video editor needs it to show the preview.

Change-Id: Ic343b5ba6c1deaeabf25a11614f8d28f2011eac4
Remove libtzplayready

Change-Id: I6a548d1f879330f199b3efde9b0b6d3418948b8d