sxmo_modemaudio.sh: fail exit if it actually failed to setup audio

Do not fire sxmo_hook_call_audio if we fails to enable call mode correctly, and
actually exit 1 when it does.

Plus check everything is actually right at the end of the hack hook.

configs/default_hooks/sxmo_hook_call_audio.sh

@@ -21,6 +21,7 @@ if [ "$1" = "enable" ]; then
 
 	# Add other things here, e.g., volume boosters
 
+	sxmo_modemaudio.sh is_disabled_speaker && sxmo_modemaudio.sh is_unmuted_mic
 # Phonecall ended
 elif [ "$1" = "disable" ]; then
 	sxmo_log "Attempting hack to get things just right."
@@ -30,4 +31,5 @@ elif [ "$1" = "disable" ]; then
 
 	# Add other things here, e.g., volume boosters
 
+	sxmo_modemaudio.sh is_enabled_speaker
 fi

scripts/modem/sxmo_modemaudio.sh

@@ -17,12 +17,16 @@ ca_dbus_set_prop() {
 }
 
 setup_audio() {
-	enable_call_audio_mode
+	if ! enable_call_audio_mode; then
+		return 1
+	fi
 	sxmo_hook_call_audio.sh "enable"
 }
 
 reset_audio() {
-	sxmo_hook_call_audio.sh "disable"
+	if ! sxmo_hook_call_audio.sh "disable"; then
+		return 1
+	fi
 	disable_call_audio_mode
 }