Don't try to use IRadio 1.x when 2.0 is available.

This change:
- prevents using both HALs when HIDL-AIDL translation shim is used
- paves way to test setup with some HAL 2.0 partitions missing

Bug: 207695009
Test: watch logcat grepped against radiocompat
Change-Id: Idf14d782c5c679a34b6b3dbe86679084dc69e0d1