hal: Support for FLAC 24 bit format in offload path

- Add flac in supported codecs list
- Set FLAC codec specific parameters
- Set fragment size based on bit width and sampling rate
  for flac
- Configure backend to 24/16 bit based on the current
  usecases running

Change-Id: If013078e277fd3053fba6489345803f8f58bd86d
diff --git a/hal/msm8960/platform.c b/hal/msm8960/platform.c
index 29d6215..2400cd8 100644
--- a/hal/msm8960/platform.c
+++ b/hal/msm8960/platform.c
@@ -950,3 +950,12 @@
 {
     return false;
 }
+
+bool platform_check_24_bit_support() {
+    return false;
+}
+
+bool platform_check_and_set_codec_backend_cfg(struct audio_device* adev, struct audio_usecase *usecase) {
+    return false;
+}
+