Adding IRadio 1.4 to vndk current.txt

To better test CBRS, we want IRadio 1.3 to be Android P plus CBRS
HAL interfaces, while 1.4 will be 1.3 plus all other Android Q
interfaces. So we are creating V1_4 folder and moving everything
currently defined in android.hardware.radio.V1_3 there.

Bug: 117805040
Test: build and telephony unittest
Change-Id: I0a0c651b25caa4d0bd88bf51c02a9f7160d0caff
Merged-In: I0a0c651b25caa4d0bd88bf51c02a9f7160d0caff