BT-HAP: HearingAid misc fixes.

  - ensure encoded data is captured.
  - change alarm to periodic.
  - suspend request always returned false
    causing issue w.r.t. resume audio.

Change-Id: I395fcd1fd651d3bbbbbcca40e35056f46cd2ecec

bta/hearing_aid/hearing_aid.cc

@@ -1214,7 +1214,7 @@ class HearingAidImpl : public HearingAid {
       encoded_data_left.resize(4000);
       int encoded_size = 0;
       if (chan_left.size() > 0) {
-          g722_encode(encoder_state_left, encoded_data_left.data(),
+          encoded_size = g722_encode(encoder_state_left, encoded_data_left.data(),
                       (const int16_t*)chan_left.data(), chan_left.size());
       } else {
         LOG(ERROR) << "Error: No chan_left data to encode";
@@ -1242,7 +1242,7 @@ class HearingAidImpl : public HearingAid {
       encoded_data_right.resize(4000);
       int encoded_size = 0;
       if (chan_right.size() > 0) {
-          g722_encode(encoder_state_right, encoded_data_right.data(),
+          encoded_size = g722_encode(encoder_state_right, encoded_data_right.data(),
                       (const int16_t*)chan_right.data(), chan_right.size());
       } else {
         LOG(ERROR) << "Error: No chan_right data to encode";

bta/hearing_aid/hearing_aid_audio_source.cc

@@ -334,6 +334,7 @@ bool hearing_aid_on_suspend_req() {
         FROM_HERE, base::Bind(&HearingAidAudioReceiver::OnAudioSuspend,
                                   base::Unretained(localAudioReceiver),
                                   base::Passed(std::move(do_suspend_promise))));
+    return true;
   } else {
     LOG(ERROR) << __func__
                << ": HEARING_AID_CTRL_CMD_SUSPEND: audio receiver not started";
@@ -378,9 +379,9 @@ void HearingAidAudioSource::Initialize() {
       .on_suspend_ = hearing_aid_on_suspend_req,
   };
 
-  audio_timer = alarm_new("hearing_aid_data_timer");
-  if (!audio_timer) {
-    LOG(WARNING) << __func__ << ": unable to create alarm.";
+  audio_timer = alarm_new_periodic("hearing_aid_data_timer");
+  if (audio_timer == nullptr) {
+    LOG(ERROR) << "unable to allocate hearing_aid_data_timer" <<  __func__;
     return;
   }
   if ((get_worker_thread() == NULL) || !bluetooth::audio::hearing_aid::init(stream_cb, get_worker_thread())) {