[HFP1.9] Make sure LC3 is really supported in host side

Currently for local ag features, BTA_AG_FEAT_HF_IND is same as BTA_AG_FEAT_SWB.
So in current logic, when remote asks for ag supported features during
sdp, we will always indicate that swb supported in sdp response.

This patch fixed that.

Bug: 298529447
Test: atest --host net_test_btif_stack net_test_stack_btu net_test_stack_btm -c
Test: manual test and make sure host sending swb not supported when it
is not really supported.

Change-Id: I0b0fc210fcf82e89df5867642b56b020323c53e7