Fix permission on TM#isDataEnabled

-Allow isDataEnabled() to be read with READ_PHONE_STATE
 This method just forwarded to another method in the public
 API that only requires READ_PHONE_STATE, so it's just a bug.

-Fix a bug where TM#getDataEnabled ws ignoring the subId parameter.

Bug: 148500541
Test: compilation
Change-Id: I30b125b50d261175a44183369e5f318d7ad37be9