audio: Use audio_get_main_format() instead of AUDIO_FORMAT_MAIN_MASK

Use the Android helper function to extract the main audio format
value instead of directly manipulating the bits.

Change-Id: I2619459475313370422a1c76049d85b763a3f349
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>

Author: rfvirgil

audio/audio_hw.c

@@ -1240,7 +1240,7 @@ static int do_init_out_compress(struct stream_out_compress *out,
 
     out->codec.sample_rate = config->sample_rate;
 
-    switch (config->format & AUDIO_FORMAT_MAIN_MASK) {
+    switch (audio_get_main_format(config->format)) {
         case AUDIO_FORMAT_MP3:
             out->codec.id = SND_AUDIOCODEC_MP3;
             break;