audio: Add FM_RX and FM_RX_A2DP to attached input device list

- FM_RX and FM_RX_A2DP are not physically connected/disconnected
from a device runtime.
- Hence if a device supports these devices, add them to
attached input device list.

Change-Id: I6d8d0a15ecba1cd382fc0957ea75bc6b4d2d6572

Conflicts:
	configs/audio_policy.conf

Conflicts:
	configs/audio_policy.conf