refactor radioPowerstate

1. new System API for getRadioPowerState with permision check
2. new System API for onRadioPowerStateChanged in PhoneStateListener
3. replace radioState enum in CommandsInterface to telephonyMgr defined
int.

Bug: 117349311
Test: telephony unit test
Change-Id: I502568280fbf9213ca6bf1f7fb204d0d4ce86580
Merged-in: I502568280fbf9213ca6bf1f7fb204d0d4ce86580