StingrayRIL: Use old fashioned subscription detection

Since this RIL is only for Stingray, this is robust enough for
our purposes.

Change-Id: Ib9f1977ae7e5b647bd75b0f14c9bc54cc32d7d43
Stingray: lets copy the android.hardware.telephony so we get the mobile data qs tile.

Signed-off-by: travp624 <travp624@gmail.com>