hal: Use call state to ensure voice call start

When RIL goes from CALL_ACTIVE to  CALL_INACTIVE,
voice session would be closed. And call_state is
set to INACTIVE whereas in_call flag is not reset.
This would cause any subsequent voice call usecase
cannot set up as in_call flag already is true.

Fix by checking current call state instead of in_call
flag to start voice call.

CRs-Fixed: 2130335
Change-Id: Ib449b2ba71b1e998d51df8ae5d2348f651b08751
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index be65139..39789f0 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -3645,7 +3645,7 @@
             out->devices = new_dev;
 
             if (output_drives_call(adev, out)) {
-                if(!voice_is_in_call(adev)) {
+                if (!voice_is_call_state_active(adev)) {
                     if (adev->mode == AUDIO_MODE_IN_CALL) {
                         adev->current_call_output = out;
                         ret = voice_start_call(adev);